GLSL: clean up GLSL output whitespace generation.

More line() and less std::endl.
More automated indents and less manual spacing.
Put a single newline after every struct and function declaration.

Note that this does touch every test result, but only affects whitespace.

Change-Id: I7506b9029b79b91fb335911dba44369b36f09bbe
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/78300
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Stephen White <senorblanco@chromium.org>

test/array/assign_to_function_var.wgsl.expected.glsl

@@ -5,12 +5,11 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
+
 void main() {
   unused_entry_point();
 }
 
-
-
 struct S {
   ivec4 arr[4];
 };
@@ -20,10 +19,10 @@ shared ivec4 src_workgroup[4];
 layout(binding = 0) uniform S_1 {
   ivec4 arr[4];
 } src_uniform;
+
 layout(binding = 1) buffer S_2 {
   ivec4 arr[4];
 } src_storage;
-
 ivec4[4] ret_arr() {
   ivec4 tint_symbol[4] = ivec4[4](ivec4(0, 0, 0, 0), ivec4(0, 0, 0, 0), ivec4(0, 0, 0, 0), ivec4(0, 0, 0, 0));
   return tint_symbol;
@@ -53,3 +52,4 @@ void foo(ivec4 src_param[4]) {
   int src_nested[4][3][2] = int[4][3][2](int[3][2](int[2](0, 0), int[2](0, 0), int[2](0, 0)), int[3][2](int[2](0, 0), int[2](0, 0), int[2](0, 0)), int[3][2](int[2](0, 0), int[2](0, 0), int[2](0, 0)), int[3][2](int[2](0, 0), int[2](0, 0), int[2](0, 0)));
   dst_nested = src_nested;
 }
+

test/array/assign_to_private_var.wgsl.expected.glsl

@@ -5,12 +5,11 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
+
 void main() {
   unused_entry_point();
 }
 
-
-
 struct S {
   ivec4 arr[4];
 };
@@ -20,12 +19,12 @@ shared ivec4 src_workgroup[4];
 layout(binding = 0) uniform S_1 {
   ivec4 arr[4];
 } src_uniform;
+
 layout(binding = 1) buffer S_2 {
   ivec4 arr[4];
 } src_storage;
 ivec4 dst[4] = ivec4[4](ivec4(0, 0, 0, 0), ivec4(0, 0, 0, 0), ivec4(0, 0, 0, 0), ivec4(0, 0, 0, 0));
 int dst_nested[4][3][2] = int[4][3][2](int[3][2](int[2](0, 0), int[2](0, 0), int[2](0, 0)), int[3][2](int[2](0, 0), int[2](0, 0), int[2](0, 0)), int[3][2](int[2](0, 0), int[2](0, 0), int[2](0, 0)), int[3][2](int[2](0, 0), int[2](0, 0), int[2](0, 0)));
-
 ivec4[4] ret_arr() {
   ivec4 tint_symbol[4] = ivec4[4](ivec4(0, 0, 0, 0), ivec4(0, 0, 0, 0), ivec4(0, 0, 0, 0), ivec4(0, 0, 0, 0));
   return tint_symbol;
@@ -53,3 +52,4 @@ void foo(ivec4 src_param[4]) {
   int src_nested[4][3][2] = int[4][3][2](int[3][2](int[2](0, 0), int[2](0, 0), int[2](0, 0)), int[3][2](int[2](0, 0), int[2](0, 0), int[2](0, 0)), int[3][2](int[2](0, 0), int[2](0, 0), int[2](0, 0)), int[3][2](int[2](0, 0), int[2](0, 0), int[2](0, 0)));
   dst_nested = src_nested;
 }
+

test/array/assign_to_storage_var.wgsl.expected.glsl

@@ -5,15 +5,15 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
+
 void main() {
   unused_entry_point();
 }
 
-
-
 struct S {
   ivec4 arr[4];
 };
+
 struct S_nested {
   int arr[4][3][2];
 };
@@ -23,6 +23,7 @@ shared ivec4 src_workgroup[4];
 layout(binding = 0) uniform S_1 {
   ivec4 arr[4];
 } src_uniform;
+
 layout(binding = 1) buffer S_2 {
   ivec4 arr[4];
 } src_storage;
@@ -32,7 +33,6 @@ layout(binding = 2) buffer S_3 {
 layout(binding = 3) buffer S_nested_1 {
   int arr[4][3][2];
 } dst_nested;
-
 ivec4[4] ret_arr() {
   ivec4 tint_symbol[4] = ivec4[4](ivec4(0, 0, 0, 0), ivec4(0, 0, 0, 0), ivec4(0, 0, 0, 0), ivec4(0, 0, 0, 0));
   return tint_symbol;
@@ -60,3 +60,4 @@ void foo(ivec4 src_param[4]) {
   int src_nested[4][3][2] = int[4][3][2](int[3][2](int[2](0, 0), int[2](0, 0), int[2](0, 0)), int[3][2](int[2](0, 0), int[2](0, 0), int[2](0, 0)), int[3][2](int[2](0, 0), int[2](0, 0), int[2](0, 0)), int[3][2](int[2](0, 0), int[2](0, 0), int[2](0, 0)));
   dst_nested.arr = src_nested;
 }
+

test/array/assign_to_subexpr.wgsl.expected.glsl

@@ -5,12 +5,11 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
+
 void main() {
   unused_entry_point();
 }
 
-
-
 struct S {
   int arr[4];
 };
@@ -26,3 +25,4 @@ void foo() {
   dst_struct.arr = src;
   dst_array[0] = src;
 }
+

test/array/assign_to_workgroup_var.wgsl.expected.glsl

@@ -5,12 +5,11 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void unused_entry_point() {
   return;
 }
+
 void main() {
   unused_entry_point();
 }
 
-
-
 struct S {
   ivec4 arr[4];
 };
@@ -20,12 +19,12 @@ shared ivec4 src_workgroup[4];
 layout(binding = 0) uniform S_1 {
   ivec4 arr[4];
 } src_uniform;
+
 layout(binding = 1) buffer S_2 {
   ivec4 arr[4];
 } src_storage;
 shared ivec4 dst[4];
 shared int dst_nested[4][3][2];
-
 ivec4[4] ret_arr() {
   ivec4 tint_symbol[4] = ivec4[4](ivec4(0, 0, 0, 0), ivec4(0, 0, 0, 0), ivec4(0, 0, 0, 0), ivec4(0, 0, 0, 0));
   return tint_symbol;
@@ -53,3 +52,4 @@ void foo(ivec4 src_param[4]) {
   int src_nested[4][3][2] = int[4][3][2](int[3][2](int[2](0, 0), int[2](0, 0), int[2](0, 0)), int[3][2](int[2](0, 0), int[2](0, 0), int[2](0, 0)), int[3][2](int[2](0, 0), int[2](0, 0), int[2](0, 0)), int[3][2](int[2](0, 0), int[2](0, 0), int[2](0, 0)));
   dst_nested = src_nested;
 }
+

test/array/function_parameter.wgsl.expected.glsl

@@ -23,8 +23,8 @@ void tint_symbol() {
   float v3 = f3(a3);
   return;
 }
+
 void main() {
   tint_symbol();
 }
 
-

test/array/function_return_type.wgsl.expected.glsl

@@ -23,8 +23,8 @@ void tint_symbol() {
   float a3[2][3][4] = f3();
   return;
 }
+
 void main() {
   tint_symbol();
 }
 
-

test/array/size.wgsl.expected.glsl

@@ -3,7 +3,6 @@ precision mediump float;
 
 const int slen = 4;
 const uint ulen = 4u;
-
 void tint_symbol() {
   float signed_literal[4] = float[4](0.0f, 0.0f, 0.0f, 0.0f);
   float unsigned_literal[4] = float[4](0.0f, 0.0f, 0.0f, 0.0f);
@@ -13,8 +12,8 @@ void tint_symbol() {
   signed_constant = unsigned_literal;
   return;
 }
+
 void main() {
   tint_symbol();
 }
 
-

test/array/type_constructor.wgsl.expected.glsl

@@ -38,8 +38,8 @@ void tint_symbol() {
   int subexpr_nested_nonempty_with_expr[4] = tint_symbol_20[1];
   return;
 }
+
 void main() {
   tint_symbol();
 }
 
-