wgsl: Replace [[decoration]] with @decoration

Deprecate the old syntax. Migrate everything to the new syntax.

Bug: tint:1382
Change-Id: Ide12b2e927b17dc93b9714c7049090864cc568d3
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/77260
Reviewed-by: James Price <jrprice@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: David Neto <dneto@google.com>
Commit-Queue: David Neto <dneto@google.com>

test/expressions/bitcast/scalar/f32-f32.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
     let a : f32 = 1.;
     let b : f32 = bitcast<f32>(a);

test/expressions/bitcast/scalar/f32-f32.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
   let a : f32 = 1.0;
   let b : f32 = bitcast<f32>(a);

test/expressions/bitcast/scalar/f32-i32.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
     let a : f32 = 1.;
     let b : i32 = bitcast<i32>(a);

test/expressions/bitcast/scalar/f32-i32.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
   let a : f32 = 1.0;
   let b : i32 = bitcast<i32>(a);

test/expressions/bitcast/scalar/f32-u32.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
     let a : f32 = 1.;
     let b : u32 = bitcast<u32>(a);

test/expressions/bitcast/scalar/f32-u32.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
   let a : f32 = 1.0;
   let b : u32 = bitcast<u32>(a);

test/expressions/bitcast/scalar/i32-f32.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
     let a : i32 = 1;
     let b : f32 = bitcast<f32>(a);

test/expressions/bitcast/scalar/i32-f32.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
   let a : i32 = 1;
   let b : f32 = bitcast<f32>(a);

test/expressions/bitcast/scalar/i32-i32.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
     let a : i32 = 1;
     let b : i32 = bitcast<i32>(a);

test/expressions/bitcast/scalar/i32-i32.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
   let a : i32 = 1;
   let b : i32 = bitcast<i32>(a);

test/expressions/bitcast/scalar/i32-u32.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
     let a : i32 = 1;
     let b : u32 = bitcast<u32>(a);

test/expressions/bitcast/scalar/i32-u32.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
   let a : i32 = 1;
   let b : u32 = bitcast<u32>(a);

test/expressions/bitcast/scalar/i32min-u32.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
   let b : u32 = bitcast<u32>(-2147483648);
 }

test/expressions/bitcast/scalar/i32min-u32.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
   let b : u32 = bitcast<u32>(-2147483648);
 }

test/expressions/bitcast/scalar/u32-f32.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
     let a : u32 = 1u;
     let b : f32 = bitcast<f32>(a);

test/expressions/bitcast/scalar/u32-f32.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
   let a : u32 = 1u;
   let b : f32 = bitcast<f32>(a);

test/expressions/bitcast/scalar/u32-i32.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
     let a : u32 = 1u;
     let b : i32 = bitcast<i32>(a);

test/expressions/bitcast/scalar/u32-i32.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
   let a : u32 = 1u;
   let b : i32 = bitcast<i32>(a);

test/expressions/bitcast/scalar/u32-u32.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
     let a : u32 = 1u;
     let b : u32 = bitcast<u32>(a);

test/expressions/bitcast/scalar/u32-u32.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
   let a : u32 = 1u;
   let b : u32 = bitcast<u32>(a);

test/expressions/bitcast/vector/f32-f32.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
     let a : vec3<f32> = vec3<f32>(1., 2., 3.);
     let b : vec3<f32> = bitcast<vec3<f32>>(a);

test/expressions/bitcast/vector/f32-f32.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
   let a : vec3<f32> = vec3<f32>(1.0, 2.0, 3.0);
   let b : vec3<f32> = bitcast<vec3<f32>>(a);

test/expressions/bitcast/vector/f32-i32.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
     let a : vec3<f32> = vec3<f32>(1., 2., 3.);
     let b : vec3<i32> = bitcast<vec3<i32>>(a);

test/expressions/bitcast/vector/f32-i32.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
   let a : vec3<f32> = vec3<f32>(1.0, 2.0, 3.0);
   let b : vec3<i32> = bitcast<vec3<i32>>(a);

test/expressions/bitcast/vector/f32-u32.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
     let a : vec3<f32> = vec3<f32>(1., 2., 3.);
     let b : vec3<u32> = bitcast<vec3<u32>>(a);

test/expressions/bitcast/vector/f32-u32.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
   let a : vec3<f32> = vec3<f32>(1.0, 2.0, 3.0);
   let b : vec3<u32> = bitcast<vec3<u32>>(a);

test/expressions/bitcast/vector/i32-f32.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
     let a : vec3<i32> = vec3<i32>(1, 2, 3);
     let b : vec3<f32> = bitcast<vec3<f32>>(a);

test/expressions/bitcast/vector/i32-f32.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
   let a : vec3<i32> = vec3<i32>(1, 2, 3);
   let b : vec3<f32> = bitcast<vec3<f32>>(a);

test/expressions/bitcast/vector/i32-i32.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
     let a : vec3<i32> = vec3<i32>(1, 2, 3);
     let b : vec3<i32> = bitcast<vec3<i32>>(a);

test/expressions/bitcast/vector/i32-i32.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
   let a : vec3<i32> = vec3<i32>(1, 2, 3);
   let b : vec3<i32> = bitcast<vec3<i32>>(a);

test/expressions/bitcast/vector/i32-u32.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
     let a : vec3<i32> = vec3<i32>(1, 2, 3);
     let b : vec3<u32> = bitcast<vec3<u32>>(a);

test/expressions/bitcast/vector/i32-u32.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
   let a : vec3<i32> = vec3<i32>(1, 2, 3);
   let b : vec3<u32> = bitcast<vec3<u32>>(a);

test/expressions/bitcast/vector/u32-f32.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
     let a : vec3<u32> = vec3<u32>(1u, 2u, 3u);
     let b : vec3<f32> = bitcast<vec3<f32>>(a);

test/expressions/bitcast/vector/u32-f32.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
   let a : vec3<u32> = vec3<u32>(1u, 2u, 3u);
   let b : vec3<f32> = bitcast<vec3<f32>>(a);

test/expressions/bitcast/vector/u32-i32.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
     let a : vec3<u32> = vec3<u32>(1u, 2u, 3u);
     let b : vec3<i32> = bitcast<vec3<i32>>(a);

test/expressions/bitcast/vector/u32-i32.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
   let a : vec3<u32> = vec3<u32>(1u, 2u, 3u);
   let b : vec3<i32> = bitcast<vec3<i32>>(a);

test/expressions/bitcast/vector/u32-u32.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
     let a : vec3<u32> = vec3<u32>(1u, 2u, 3u);
     let b : vec3<u32> = bitcast<vec3<u32>>(a);

test/expressions/bitcast/vector/u32-u32.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn f() {
   let a : vec3<u32> = vec3<u32>(1u, 2u, 3u);
   let b : vec3<u32> = bitcast<vec3<u32>>(a);