Remove offscreen compositor contexts.

ui/compositor/test/in_process_context_factory.h

 // Copyright 2014 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.
 
 #ifndef UI_COMPOSITOR_TEST_IN_PROCESS_CONTEXT_FACTORY_H_
 #define UI_COMPOSITOR_TEST_IN_PROCESS_CONTEXT_FACTORY_H_
 
 #include "ui/compositor/compositor.h"
 
 namespace webkit {
@@ skipping 12 matching lines @@
   // ContextFactory implementation
   virtual scoped_ptr<cc::OutputSurface> CreateOutputSurface(
       Compositor* compositor,
       bool software_fallback) OVERRIDE;
 
   virtual scoped_refptr<Reflector> CreateReflector(
       Compositor* mirrored_compositor,
       Layer* mirroring_layer) OVERRIDE;
   virtual void RemoveReflector(scoped_refptr<Reflector> reflector) OVERRIDE;
 
-  virtual scoped_refptr<cc::ContextProvider>
-      OffscreenCompositorContextProvider() OVERRIDE;
   virtual scoped_refptr<cc::ContextProvider> SharedMainThreadContextProvider()
       OVERRIDE;
   virtual void RemoveCompositor(Compositor* compositor) OVERRIDE;
   virtual bool DoesCreateTestContexts() OVERRIDE;
 
  private:
   scoped_refptr<webkit::gpu::ContextProviderInProcess>
-      offscreen_compositor_contexts_;
-  scoped_refptr<webkit::gpu::ContextProviderInProcess>
       shared_main_thread_contexts_;
 
   DISALLOW_COPY_AND_ASSIGN(InProcessContextFactory);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_TEST_IN_PROCESS_CONTEXT_FACTORY_H_