Expose UpdateOffscreenFrameBufferSize from GLES2Decoder to allow Mac...

gpu/command_buffer/service/gpu_processor_mac.cc

 // Copyright (c) 2010 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 "app/gfx/gl/gl_context.h"
 #include "gpu/command_buffer/service/gpu_processor.h"
 
 using ::base::SharedMemory;
 
 namespace gpu {
@@ skipping 53 matching lines @@
     surface_->Destroy();
   }
   surface_.reset();
 #endif
   DestroyCommon();
 }
 
 uint64 GPUProcessor::SetWindowSizeForIOSurface(const gfx::Size& size) {
 #if !defined(UNIT_TEST)
   ResizeOffscreenFrameBuffer(size);
+  decoder_->UpdateOffscreenFrameBufferSize();
   return surface_->SetSurfaceSize(size);
 #else
   return 0;
 #endif
 }
 
 TransportDIB::Handle GPUProcessor::SetWindowSizeForTransportDIB(
     const gfx::Size& size) {
 #if !defined(UNIT_TEST)
   ResizeOffscreenFrameBuffer(size);
+  decoder_->UpdateOffscreenFrameBufferSize();
   return surface_->SetTransportDIBSize(size);
 #else
   return TransportDIB::DefaultHandleValue();
 #endif
 }
 
 void GPUProcessor::SetTransportDIBAllocAndFree(
       Callback2<size_t, TransportDIB::Handle*>::Type* allocator,
       Callback1<TransportDIB::Id>::Type* deallocator) {
 #if !defined(UNIT_TEST)
   surface_->SetTransportDIBAllocAndFree(allocator, deallocator);
 #endif
 }
 
 void GPUProcessor::WillSwapBuffers() {
   DCHECK(context_->IsCurrent());
 #if !defined(UNIT_TEST)
   if (surface_.get()) {
     surface_->SwapBuffers();
   }
 #endif
 
   if (wrapped_swap_buffers_callback_.get()) {
     wrapped_swap_buffers_callback_->Run();
   }
 }
 
 }  // namespace gpu