Remove offscreen compositor contexts.

content/test/web_layer_tree_view_impl_for_testing.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/test/web_layer_tree_view_impl_for_testing.h"
 
 #include "base/command_line.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/synchronization/lock.h"
 #include "cc/base/switches.h"
@@ skipping 132 matching lines @@
 void WebLayerTreeViewImplForTesting::ApplyScrollAndScale(
     const gfx::Vector2d& scroll_delta,
     float page_scale) {}
 
 scoped_ptr<cc::OutputSurface>
 WebLayerTreeViewImplForTesting::CreateOutputSurface(bool fallback) {
   return make_scoped_ptr(
       new cc::OutputSurface(cc::TestContextProvider::Create()));
 }
 
-scoped_refptr<cc::ContextProvider>
-WebLayerTreeViewImplForTesting::OffscreenContextProvider() {
-  // Unit tests only run in single threaded mode.
-  return content::TestContextProviderFactory::GetInstance()->
-      OffscreenContextProviderForMainThread();
-}
-
 void WebLayerTreeViewImplForTesting::registerViewportLayers(
     const blink::WebLayer* pageScaleLayer,
     const blink::WebLayer* innerViewportScrollLayer,
     const blink::WebLayer* outerViewportScrollLayer) {
   layer_tree_host_->RegisterViewportLayers(
       static_cast<const WebLayerImpl*>(pageScaleLayer)->layer(),
       static_cast<const WebLayerImpl*>(innerViewportScrollLayer)->layer(),
       // The outer viewport layer will only exist when using pinch virtual
       // viewports.
       outerViewportScrollLayer
           ? static_cast<const WebLayerImpl*>(outerViewportScrollLayer)->layer()
           : NULL);
 }
 
 void WebLayerTreeViewImplForTesting::clearViewportLayers() {
   layer_tree_host_->RegisterViewportLayers(scoped_refptr<cc::Layer>(),
                                            scoped_refptr<cc::Layer>(),
                                            scoped_refptr<cc::Layer>());
 }
 
 }  // namespace content