content: Add DeletedGpuMemoryBuffer IPC.

content/common/gpu/client/gpu_memory_buffer_impl_io_surface.cc

 // Copyright 2013 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.
 
 #include "content/common/gpu/client/gpu_memory_buffer_impl_io_surface.h"
 
 #include "base/logging.h"
 #include "ui/gl/gl_bindings.h"
 
 namespace content {
@@ skipping 37 matching lines @@
   switch (internalformat) {
     case GL_BGRA8_EXT:
       return 'BGRA';
     default:
       NOTREACHED();
       return 0;
   }
 }
 
 bool GpuMemoryBufferImplIOSurface::InitializeFromHandle(
-    gfx::GpuMemoryBufferHandle handle) {
+    const gfx::GpuMemoryBufferHandle& handle) {
   DCHECK(IsFormatSupported(internalformat_));
   io_surface_.reset(IOSurfaceLookup(handle.io_surface_id));
   if (!io_surface_) {
     VLOG(1) << "IOSurface lookup failed";
     return false;
   }
 
   return true;
 }
 
@@ skipping 15 matching lines @@
 }
 
 gfx::GpuMemoryBufferHandle GpuMemoryBufferImplIOSurface::GetHandle() const {
   gfx::GpuMemoryBufferHandle handle;
   handle.type = gfx::IO_SURFACE_BUFFER;
   handle.io_surface_id = IOSurfaceGetID(io_surface_);
   return handle;
 }
 
 }  // namespace content