Add alpha argument to glResizeCHROMIUM

cc/output/output_surface.cc

 // Copyright (c) 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 "cc/output/output_surface.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
@@ skipping 239 matching lines @@
     software_device_->DiscardBackbuffer();
 }
 
 void OutputSurface::Reshape(const gfx::Size& size, float scale_factor) {
   if (size == surface_size_ && scale_factor == device_scale_factor_)
     return;
 
   surface_size_ = size;
   device_scale_factor_ = scale_factor;
   if (context_provider_.get()) {
-    context_provider_->ContextGL()->ResizeCHROMIUM(
-        size.width(), size.height(), scale_factor);
+    context_provider_->ContextGL()->ResizeCHROMIUM(size.width(), size.height(),
+                                                   scale_factor, GL_TRUE);
   }
   if (software_device_)
     software_device_->Resize(size, scale_factor);
 }
 
 void OutputSurface::BindFramebuffer() {
   DCHECK(context_provider_.get());
   context_provider_->ContextGL()->BindFramebuffer(GL_FRAMEBUFFER, 0);
 }
 
@@ skipping 89 matching lines @@
   if (context_provider_.get()) {
     context_provider_->SetLostContextCallback(
         ContextProvider::LostContextCallback());
   }
   context_provider_ = nullptr;
   client_ = nullptr;
   weak_ptr_factory_.InvalidateWeakPtrs();
 }
 
 }  // namespace cc