Implement accessibility support for CSS-transformed iframes.

content/common/cc_messages.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // IPC Messages sent between compositor instances.
 
 #include "cc/output/begin_frame_args.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "cc/output/filter_operation.h"
@@ skipping 58 matching lines @@
 struct ParamTraits<skia::RefPtr<SkImageFilter> > {
   typedef skia::RefPtr<SkImageFilter> param_type;
   static void Write(base::Pickle* m, const param_type& p);
   static bool Read(const base::Pickle* m,
                    base::PickleIterator* iter,
                    param_type* r);
   static void Log(const param_type& p, std::string* l);
 };
 
 template <>
-struct ParamTraits<gfx::Transform> {
-  typedef gfx::Transform param_type;
-  static void Write(base::Pickle* m, const param_type& p);
-  static bool Read(const base::Pickle* m,
-                   base::PickleIterator* iter,
-                   param_type* r);
-  static void Log(const param_type& p, std::string* l);
-};
-
-template <>
 struct CONTENT_EXPORT ParamTraits<cc::RenderPass> {
   typedef cc::RenderPass param_type;
   static void Write(base::Pickle* m, const param_type& p);
   static bool Read(const base::Pickle* m,
                    base::PickleIterator* iter,
                    param_type* r);
   static void Log(const param_type& p, std::string* l);
 };
 
 template<>
@@ skipping 245 matching lines @@
   IPC_STRUCT_TRAITS_MEMBER(satisfies_sequences)
   IPC_STRUCT_TRAITS_MEMBER(referenced_surfaces)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(cc::GLFrameData)
   IPC_STRUCT_TRAITS_MEMBER(mailbox)
   IPC_STRUCT_TRAITS_MEMBER(sync_token)
   IPC_STRUCT_TRAITS_MEMBER(size)
   IPC_STRUCT_TRAITS_MEMBER(sub_buffer_rect)
 IPC_STRUCT_TRAITS_END()