Remove offscreen compositor contexts.

ui/compositor/compositor.h

 // Copyright (c) 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.
 
 #ifndef UI_COMPOSITOR_COMPOSITOR_H_
 #define UI_COMPOSITOR_COMPOSITOR_H_
 
 #include <string>
 
 #include "base/containers/hash_tables.h"
@@ skipping 64 matching lines @@
       Compositor* compositor, bool software_fallback) = 0;
 
   // Creates a reflector that copies the content of the |mirrored_compositor|
   // onto |mirroing_layer|.
   virtual scoped_refptr<Reflector> CreateReflector(
       Compositor* mirrored_compositor,
       Layer* mirroring_layer) = 0;
   // Removes the reflector, which stops the mirroring.
   virtual void RemoveReflector(scoped_refptr<Reflector> reflector) = 0;
 
-  // Returns a reference to the offscreen context provider used by the
-  // compositor. This provider is bound and used on whichever thread the
-  // compositor is rendering from.
-  virtual scoped_refptr<cc::ContextProvider>
-      OffscreenCompositorContextProvider() = 0;
-
   // Return a reference to a shared offscreen context provider usable from the
-  // main thread. This may be the same as OffscreenCompositorContextProvider()
-  // depending on the compositor's threading configuration. This provider will
-  // be bound to the main thread.
+  // main thread.
   virtual scoped_refptr<cc::ContextProvider>
       SharedMainThreadContextProvider() = 0;
 
   // Destroys per-compositor data.
   virtual void RemoveCompositor(Compositor* compositor) = 0;
 
   // When true, the factory uses test contexts that do not do real GL
   // operations.
   virtual bool DoesCreateTestContexts() = 0;
 };
@@ skipping 121 matching lines @@
   virtual void Layout() OVERRIDE;
   virtual void ApplyScrollAndScale(const gfx::Vector2d& scroll_delta,
                                    float page_scale) OVERRIDE {}
   virtual scoped_ptr<cc::OutputSurface> CreateOutputSurface(bool fallback)
       OVERRIDE;
   virtual void DidInitializeOutputSurface(bool success) OVERRIDE {}
   virtual void WillCommit() OVERRIDE {}
   virtual void DidCommit() OVERRIDE;
   virtual void DidCommitAndDrawFrame() OVERRIDE;
   virtual void DidCompleteSwapBuffers() OVERRIDE;
-  virtual scoped_refptr<cc::ContextProvider>
-      OffscreenContextProvider() OVERRIDE;
 
   // cc::LayerTreeHostSingleThreadClient implementation.
   virtual void ScheduleComposite() OVERRIDE;
   virtual void ScheduleAnimation() OVERRIDE;
   virtual void DidPostSwapBuffers() OVERRIDE;
   virtual void DidAbortSwapBuffers() OVERRIDE;
 
   int last_started_frame() { return last_started_frame_; }
   int last_ended_frame() { return last_ended_frame_; }
 
@@ skipping 52 matching lines @@
   SwapState swap_state_;
 
   base::WeakPtrFactory<Compositor> schedule_draw_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Compositor);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_COMPOSITOR_H_