Reland of Added HardwareAccelerationEnabled() function

content/browser/gpu/gpu_data_manager_impl.h

 // Copyright (c) 2013 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_BROWSER_GPU_GPU_DATA_MANAGER_IMPL_H_
 #define CONTENT_BROWSER_GPU_GPU_DATA_MANAGER_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 77 matching lines @@
   void AddObserver(GpuDataManagerObserver* observer) override;
   void RemoveObserver(GpuDataManagerObserver* observer) override;
   void UnblockDomainFrom3DAPIs(const GURL& url) override;
   void SetGLStrings(const std::string& gl_vendor,
                     const std::string& gl_renderer,
                     const std::string& gl_version) override;
   void GetGLStrings(std::string* gl_vendor,
                     std::string* gl_renderer,
                     std::string* gl_version) override;
   void DisableHardwareAcceleration() override;
+  bool HardwareAccelerationEnabled() const override;
   bool CanUseGpuBrowserCompositor() const override;
   void GetDisabledExtensions(std::string* disabled_extensions) const override;
   void SetGpuInfo(const gpu::GPUInfo& gpu_info) override;
 
   // This collects preliminary GPU info, load GpuBlacklist, and compute the
   // preliminary blacklisted features; it should only be called at browser
   // startup time in UI thread before the IO restriction is turned on.
   void Initialize();
 
   // Only update if the current GPUInfo is not finalized.  If blacklist is
@@ skipping 117 matching lines @@
 
   mutable base::Lock lock_;
   std::unique_ptr<GpuDataManagerImplPrivate> private_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuDataManagerImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GPU_GPU_DATA_MANAGER_IMPL_H_