Implement TextureImageTransportSurface using texture mailbox

content/common/gpu/gpu_messages.h

Index: content/common/gpu/gpu_messages.h
diff --git a/content/common/gpu/gpu_messages.h b/content/common/gpu/gpu_messages.h
index d72bf0541b1494491d60eccaa63dbacaf4602e37..38d2156ab76c6d0c2eedad26ee79dd24e52bee48 100644
--- a/content/common/gpu/gpu_messages.h
+++ b/content/common/gpu/gpu_messages.h
@@ -46,6 +46,7 @@ IPC_STRUCT_BEGIN(GpuHostMsg_AcceleratedSurfaceNew_Params)
   IPC_STRUCT_MEMBER(int32, width)
   IPC_STRUCT_MEMBER(int32, height)
   IPC_STRUCT_MEMBER(uint64, surface_handle)
+  IPC_STRUCT_MEMBER(std::string, mailbox_name)
   IPC_STRUCT_MEMBER(int32, route_id)
 #if defined(OS_MACOSX)
   IPC_STRUCT_MEMBER(gfx::PluginWindowHandle, window)
@@ -63,8 +64,6 @@ IPC_STRUCT_BEGIN(GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params)
 #if defined(OS_MACOSX)
   IPC_STRUCT_MEMBER(gfx::PluginWindowHandle, window)
 #endif
-  IPC_STRUCT_MEMBER(uint32, protection_state_id)
-  IPC_STRUCT_MEMBER(bool, skip_ack)
 IPC_STRUCT_END()
 #undef IPC_MESSAGE_EXPORT
 #define IPC_MESSAGE_EXPORT
@@ -81,12 +80,10 @@ IPC_STRUCT_BEGIN(GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params)
 #if defined(OS_MACOSX)
   IPC_STRUCT_MEMBER(gfx::PluginWindowHandle, window)
 #endif
-  IPC_STRUCT_MEMBER(uint32, protection_state_id)
 IPC_STRUCT_END()
 
 IPC_STRUCT_BEGIN(GpuHostMsg_AcceleratedSurfaceRelease_Params)
   IPC_STRUCT_MEMBER(int32, surface_id)
-  IPC_STRUCT_MEMBER(uint64, identifier)
   IPC_STRUCT_MEMBER(int32, route_id)
 #if defined(OS_MACOSX)
   IPC_STRUCT_MEMBER(gfx::PluginWindowHandle, window)
@@ -197,10 +194,6 @@ IPC_STRUCT_TRAITS_BEGIN(gfx::GLSurfaceHandle)
   IPC_STRUCT_TRAITS_MEMBER(transport)
   IPC_STRUCT_TRAITS_MEMBER(parent_gpu_process_id)
   IPC_STRUCT_TRAITS_MEMBER(parent_client_id)
-  IPC_STRUCT_TRAITS_MEMBER(parent_context_id)
-  IPC_STRUCT_TRAITS_MEMBER(parent_texture_id[0])
-  IPC_STRUCT_TRAITS_MEMBER(parent_texture_id[1])
-  IPC_STRUCT_TRAITS_MEMBER(sync_point)
 IPC_STRUCT_TRAITS_END()
 
 IPC_ENUM_TRAITS(content::CauseForGpuLaunch)
@@ -280,16 +273,12 @@ IPC_MESSAGE_CONTROL1(GpuMsg_SetVideoMemoryWindowCount,
 // view.
 IPC_MESSAGE_ROUTED0(AcceleratedSurfaceMsg_ResizeViewACK)
 
-// Tells the GPU process if it's worth suggesting release of the front surface.
-IPC_MESSAGE_ROUTED2(AcceleratedSurfaceMsg_SetFrontSurfaceIsProtected,
-                    bool /* is_protected */,
-                    uint32 /* protection_state_id */)
-
 // Tells the GPU process that the browser process has handled the swap
 // buffers or post sub-buffer request. A non-zero sync point means
-// that we should wait for the sync point.
+// that we should wait for the sync point. The surface_handle identifies
+// that buffer that has finished presented, i.e. the buffer being returned.
 IPC_MESSAGE_ROUTED2(AcceleratedSurfaceMsg_BufferPresented,
-                    bool /* presented */,
+                    uint64 /* surface_handle */,
                     uint32 /* sync_point */)
 
 // Tells the GPU process to remove all contexts.