Cleanup GpuMemoryManager and helpers.

ui/gl/gl_context.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_GL_GL_CONTEXT_H_
 #define UI_GL_GL_CONTEXT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 56 matching lines @@
   // Set swap interval. This context must be current.
   void SetSwapInterval(int interval);
 
   // Forces the swap interval to zero (no vsync) regardless of any future values
   // passed to SetSwapInterval.
   void ForceSwapIntervalZero(bool force);
 
   // Returns space separated list of extensions. The context must be current.
   virtual std::string GetExtensions();
 
-  // Returns in bytes the total amount of GPU memory for the GPU which this
-  // context is currently rendering on. Returns false if no extension exists
-  // to get the exact amount of GPU memory.
-  virtual bool GetTotalGpuMemory(size_t* bytes);
-
   // Indicate that it is safe to force this context to switch GPUs, since
   // transitioning can cause corruption and hangs (OS X only).
   virtual void SetSafeToForceGpuSwitch();
 
   // Attempt to force the context to move to the GPU of its sharegroup. Return
   // false only in the event of an unexpected error on the context.
   virtual bool ForceGpuSwitchIfNeeded();
 
   // Indicate that the real context switches should unbind the FBO first
   // (For an Android work-around only).
@@ skipping 112 matching lines @@
   void SetCurrent(GLSurface* surface) override;
 
  private:
   scoped_ptr<gfx::GPUTiming> gpu_timing_;
   DISALLOW_COPY_AND_ASSIGN(GLContextReal);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_CONTEXT_H_