cc: Drop ContextProvider references on the impl thread before quitting

cc/output/gl_renderer_unittest.cc

 // Copyright 2012 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/gl_renderer.h"
 
 #include <set>
 
 #include "cc/base/math_util.h"
 #include "cc/debug/test_web_graphics_context_3d.h"
@@ skipping 172 matching lines @@
   RenderPassList render_passes_in_draw_order_;
   gfx::Size viewport_size_;
 };
 
 class FakeRendererGL : public GLRenderer {
  public:
   FakeRendererGL(RendererClient* client,
                  const LayerTreeSettings* settings,
                  OutputSurface* output_surface,
                  ResourceProvider* resource_provider)
-      : GLRenderer(client, settings, output_surface, resource_provider, 0) {}
+      : GLRenderer(client,
+                   settings,
+                   output_surface,
+                   resource_provider,
+                   NULL,
+                   0) {}
 
   // GLRenderer methods.
 
   // Changing visibility to public.
   using GLRenderer::Initialize;
   using GLRenderer::IsBackbufferDiscarded;
   using GLRenderer::DoDrawQuad;
   using GLRenderer::BeginDrawingFrame;
   using GLRenderer::FinishDrawingQuadList;
   using GLRenderer::stencil_enabled;
@@ skipping 1449 matching lines @@
   base::MessageLoop::current()->Run();
 
   // The sync point should have happened.
   EXPECT_EQ(1, sync_point_callback_count);
   EXPECT_EQ(1, other_callback_count);
 }
 #endif  // OS_ANDROID
 
 }  // namespace
 }  // namespace cc