Revert of Pepper takes ownership of a mailbox before passing it to the texture layer.

ppapi/proxy/ppb_graphics_3d_proxy.cc

Index: ppapi/proxy/ppb_graphics_3d_proxy.cc
diff --git a/ppapi/proxy/ppb_graphics_3d_proxy.cc b/ppapi/proxy/ppb_graphics_3d_proxy.cc
index 0c21e377733751873561ff42642fd1df3a818fba..ccb784b77f527bf233171f70a0ed4ea611e36dec 100644
--- a/ppapi/proxy/ppb_graphics_3d_proxy.cc
+++ b/ppapi/proxy/ppb_graphics_3d_proxy.cc
@@ -105,10 +105,6 @@
   NOTREACHED();
 }
 
-void Graphics3D::TakeFrontBuffer() {
-  NOTREACHED();
-}
-
 gpu::CommandBuffer* Graphics3D::GetCommandBuffer() {
   return command_buffer_.get();
 }
@@ -123,11 +119,6 @@
 
   gpu::gles2::GLES2Implementation* gl = gles2_impl();
   gl->SwapBuffers();
-
-  PluginDispatcher::GetForResource(this)->Send(
-      new PpapiHostMsg_PPBGraphics3D_TakeFrontBuffer(API_ID_PPB_GRAPHICS_3D,
-                                                     host_resource()));
-
   const GLuint64 fence_sync = gl->InsertFenceSyncCHROMIUM();
   gl->ShallowFlushCHROMIUM();
 
@@ -221,8 +212,6 @@
                         OnMsgDestroyTransferBuffer)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBGraphics3D_SwapBuffers,
                         OnMsgSwapBuffers)
-    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBGraphics3D_TakeFrontBuffer,
-                        OnMsgTakeFrontBuffer)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBGraphics3D_EnsureWorkVisible,
                         OnMsgEnsureWorkVisible)
 #endif  // !defined(OS_NACL)
@@ -356,12 +345,6 @@
         enter.object()->SwapBuffersWithSyncToken(enter.callback(), sync_token));
 }
 
-void PPB_Graphics3D_Proxy::OnMsgTakeFrontBuffer(const HostResource& context) {
-  EnterHostFromHostResource<PPB_Graphics3D_API> enter(context);
-  if (enter.succeeded())
-    enter.object()->TakeFrontBuffer();
-}
-
 void PPB_Graphics3D_Proxy::OnMsgEnsureWorkVisible(const HostResource& context) {
   EnterHostFromHostResource<PPB_Graphics3D_API> enter(context);
   if (enter.succeeded())