Add PERSISTENT_MAP usage for GpuMemoryBuffers.

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 <list>
 #include <string>
 
@@ skipping 76 matching lines @@
   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;
 
-  // Returns the OpenGL target to use for image textures.
-  virtual uint32 GetImageTextureTarget() = 0;
+  // Returns the OpenGL target to use for mapable image textures.
+  virtual uint32 GetMapImageTextureTarget() = 0;
+
+  // Returns the OpenGL target to use for persistent-mapable image textures.
+  virtual uint32 GetPersistentMapImageTextureTarget() = 0;

[reveman, 2015/05/20 14:26:08]

Same here. Having a different function for each configuration doesn't work long
term.

 
   // Gets the shared bitmap manager for software mode.
   virtual cc::SharedBitmapManager* GetSharedBitmapManager() = 0;
 
   // Gets the GPU memory buffer manager.
   virtual gpu::GpuMemoryBufferManager* GetGpuMemoryBufferManager() = 0;
 
   // Gets the task graph runner.
   virtual cc::TaskGraphRunner* GetTaskGraphRunner() = 0;
 
@@ skipping 247 matching lines @@
   cc::BeginFrameArgs missed_begin_frame_args_;
 
   base::WeakPtrFactory<Compositor> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Compositor);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_COMPOSITOR_H_