Revert of Added HardwareAccelerationEnabled() function

content/public/browser/gpu_data_manager.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 CONTENT_PUBLIC_BROWSER_GPU_DATA_MANAGER_H_
 #define CONTENT_PUBLIC_BROWSER_GPU_DATA_MANAGER_H_
 
 #include <list>
 #include <string>
 
@@ skipping 82 matching lines @@
                             const std::string& gl_version) = 0;
 
   // Obtain collected GL strings.
   virtual void GetGLStrings(std::string* gl_vendor,
                             std::string* gl_renderer,
                             std::string* gl_version) = 0;
 
   // Turn off all hardware acceleration.
   virtual void DisableHardwareAcceleration() = 0;
 
-  // Whether a GPU is in use (as opposed to a software renderer).
-  virtual bool HardwareAccelerationEnabled() const = 0;
-
   // Whether the browser compositor can be used.
   virtual bool CanUseGpuBrowserCompositor() const = 0;
 
   // Extensions that are currently disabled.
   virtual void GetDisabledExtensions(
       std::string* disabled_extensions) const = 0;
 
   // Sets the initial GPU information. This should happen before calculating
   // the backlists decision and applying commandline switches.
   virtual void SetGpuInfo(const gpu::GPUInfo& gpu_info) = 0;
 
  protected:
   virtual ~GpuDataManager() {}
 };
 
 };  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_GPU_DATA_MANAGER_H_