Implement accessibility support for CSS-transformed iframes.

ui/gfx/ipc/gfx_param_traits.h

 // Copyright 2014 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.
 
 #ifndef UI_GFX_IPC_GFX_PARAM_TRAITS_H_
 #define UI_GFX_IPC_GFX_PARAM_TRAITS_H_
 
 #include <string>
 
 #include "ipc/ipc_message_utils.h"
@@ skipping 11 matching lines @@
 namespace gfx {
 class Point;
 class PointF;
 class Point3F;
 class Range;
 class Rect;
 class RectF;
 class ScrollOffset;
 class Size;
 class SizeF;
+class Transform;
 class Vector2d;
 class Vector2dF;
 }  // namespace gfx
 
 namespace IPC {
 
 template <>
 struct GFX_IPC_EXPORT ParamTraits<gfx::Point> {
   typedef gfx::Point param_type;
   static void Write(base::Pickle* m, const param_type& p);
@@ skipping 110 matching lines @@
 template <>
 struct GFX_IPC_EXPORT ParamTraits<gfx::ScrollOffset> {
   typedef gfx::ScrollOffset 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 GFX_IPC_EXPORT 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);
+};
+
 #if defined(OS_MACOSX) && !defined(OS_IOS)
 template <>
 struct GFX_IPC_EXPORT ParamTraits<gfx::ScopedRefCountedIOSurfaceMachPort> {
   typedef gfx::ScopedRefCountedIOSurfaceMachPort param_type;
   static void Write(base::Pickle* m, const param_type p);
   // Note: Read() passes ownership of the Mach send right from the IPC message
   // to the ScopedRefCountedIOSurfaceMachPort. Therefore, Read() may only be
   // called once for a given message, otherwise the singular right will be
   // managed and released by two objects.
   static bool Read(const base::Pickle* m,
                    base::PickleIterator* iter,
                    param_type* r);
   static void Log(const param_type& p, std::string* l);
 };
 #endif  // defined(OS_MACOSX) && !defined(OS_IOS)
 
 }  // namespace IPC
 
 #endif  // UI_GFX_IPC_GFX_PARAM_TRAITS_H_