Implement TextureImageTransportSurface using texture mailbox

content/common/gpu/image_transport_surface.cc

Index: content/common/gpu/image_transport_surface.cc
diff --git a/content/common/gpu/image_transport_surface.cc b/content/common/gpu/image_transport_surface.cc
index dce01a234876b204cbd5f8ed3ccb2e139855893a..4bda8e8fbee39ce4a5f19c464c0c63c573940a07 100644
--- a/content/common/gpu/image_transport_surface.cc
+++ b/content/common/gpu/image_transport_surface.cc
@@ -24,10 +24,6 @@ ImageTransportSurface::ImageTransportSurface() {}
 
 ImageTransportSurface::~ImageTransportSurface() {}
 
-void ImageTransportSurface::OnSetFrontSurfaceIsProtected(
-    bool is_protected, uint32 protection_state_id) {
-}
-
 void ImageTransportSurface::GetRegionsToCopy(
     const gfx::Rect& previous_damage_rect,
     const gfx::Rect& new_damage_rect,
@@ -100,8 +96,6 @@ bool ImageTransportHelper::OnMessageReceived(const IPC::Message& message) {
   IPC_BEGIN_MESSAGE_MAP(ImageTransportHelper, message)
     IPC_MESSAGE_HANDLER(AcceleratedSurfaceMsg_BufferPresented,
                         OnBufferPresented)
-    IPC_MESSAGE_HANDLER(AcceleratedSurfaceMsg_SetFrontSurfaceIsProtected,
-                        OnSetFrontSurfaceIsProtected)
     IPC_MESSAGE_HANDLER(AcceleratedSurfaceMsg_ResizeViewACK, OnResizeViewACK);
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
@@ -207,11 +201,6 @@ gpu::gles2::GLES2Decoder* ImageTransportHelper::Decoder() {
   return stub_->decoder();
 }
 
-void ImageTransportHelper::OnSetFrontSurfaceIsProtected(
-    bool is_protected, uint32 protection_state_id) {
-  surface_->OnSetFrontSurfaceIsProtected(is_protected, protection_state_id);
-}
-
 void ImageTransportHelper::OnBufferPresented(uint32 sync_point) {
   surface_->OnBufferPresented(sync_point);
 }