Remove offscreen compositor contexts.

content/browser/android/in_process/synchronous_compositor_output_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/browser/android/in_process/synchronous_compositor_output_surface.h"
 
 #include "base/auto_reset.h"
 #include "base/logging.h"
 #include "cc/output/begin_frame_args.h"
 #include "cc/output/compositor_frame.h"
@@ skipping 152 matching lines @@
 }
 
 namespace {
 void AdjustTransform(gfx::Transform* transform, gfx::Rect viewport) {
   // CC's draw origin starts at the viewport.
   transform->matrix().postTranslate(-viewport.x(), -viewport.y(), 0);
 }
 } // namespace
 
 bool SynchronousCompositorOutputSurface::InitializeHwDraw(
-    scoped_refptr<cc::ContextProvider> onscreen_context_provider,
-    scoped_refptr<cc::ContextProvider> offscreen_context_provider) {
+    scoped_refptr<cc::ContextProvider> onscreen_context_provider) {
   DCHECK(CalledOnValidThread());
   DCHECK(HasClient());
   DCHECK(!context_provider_);
 
-  return InitializeAndSetContext3d(onscreen_context_provider,
-                                   offscreen_context_provider);
+  return InitializeAndSetContext3d(onscreen_context_provider);
 }
 
 void SynchronousCompositorOutputSurface::ReleaseHwDraw() {
   DCHECK(CalledOnValidThread());
   cc::OutputSurface::ReleaseGL();
 }
 
 bool SynchronousCompositorOutputSurface::DemandDrawHw(
     gfx::Size surface_size,
     const gfx::Transform& transform,
@@ skipping 90 matching lines @@
 bool SynchronousCompositorOutputSurface::CalledOnValidThread() const {
   return BrowserThread::CurrentlyOn(BrowserThread::UI);
 }
 
 SynchronousCompositorOutputSurfaceDelegate*
 SynchronousCompositorOutputSurface::GetDelegate() {
   return SynchronousCompositorImpl::FromRoutingID(routing_id_);
 }
 
 }  // namespace content