Remove typ::TypePair.

You've helped us bridge two worlds.
Good Night, Sweet Prince.

Fixed: tint:724
Change-Id: I0b4ba960e9cf5dcff7df9d2f332ea36d6663c440
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/51667
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
Auto-Submit: Ben Clayton <bclayton@google.com>

src/ast/bitcast_expression.h

@@ -20,6 +20,9 @@
 namespace tint {
 namespace ast {
 
+// Forward declaration
+class Type;
+
 /// A bitcast expression
 class BitcastExpression : public Castable<BitcastExpression, Expression> {
  public:

src/ast/function.h

@@ -28,7 +28,6 @@
 #include "src/ast/location_decoration.h"
 #include "src/ast/pipeline_stage.h"
 #include "src/ast/variable.h"
-#include "src/typepair.h"
 
 namespace tint {
 namespace ast {

src/ast/intrinsic_texture_helper_test.cc

@@ -171,7 +171,7 @@ ast::Variable* TextureOverloadCase::buildTextureVariable(
           ast::StorageClass::kNone, nullptr, decos);
 
     case ast::intrinsic::test::TextureKind::kStorage: {
-      auto st = b->ty.storage_texture(texture_dimension, image_format);
+      auto* st = b->ty.storage_texture(texture_dimension, image_format);
       auto* ac = b->ty.access(access_control, st);
       return b->Global("texture", ac, ast::StorageClass::kNone, nullptr, decos);
     }

src/ast/struct_member.h

@@ -19,11 +19,13 @@
 #include <vector>
 
 #include "src/ast/decoration.h"
-#include "src/typepair.h"
 
 namespace tint {
 namespace ast {
 
+// Forward declaration
+class Type;
+
 /// A struct member statement.
 class StructMember : public Castable<StructMember, Node> {
  public:

src/ast/type_constructor_expression.h

@@ -22,6 +22,9 @@
 namespace tint {
 namespace ast {
 
+// Forward declaration
+class Type;
+
 /// A type specific constructor
 class TypeConstructorExpression
     : public Castable<TypeConstructorExpression, ConstructorExpression> {

src/ast/variable.h

@@ -25,9 +25,11 @@
 namespace tint {
 namespace ast {
 
+// Forward declarations
 class BindingDecoration;
 class GroupDecoration;
 class LocationDecoration;
+class Type;
 
 /// A Variable statement.
 ///