Make gpu black list work again on Linux

content/browser/gpu/gpu_data_manager_impl_private.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_PRIVATE_H_
 #define CONTENT_BROWSER_GPU_GPU_DATA_MANAGER_IMPL_PRIVATE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 19 matching lines @@
 
 namespace content {
 
 class CONTENT_EXPORT GpuDataManagerImplPrivate {
  public:
   static GpuDataManagerImplPrivate* Create(GpuDataManagerImpl* owner);
 
   void InitializeForTesting(
       const std::string& gpu_blacklist_json,
       const gpu::GPUInfo& gpu_info);
+  bool IsInitialized() const;
   bool IsFeatureBlacklisted(int feature) const;
   bool IsDriverBugWorkaroundActive(int feature) const;
   gpu::GPUInfo GetGPUInfo() const;
   void GetGpuProcessHandles(
       const GpuDataManager::GetGpuProcessHandlesCallback& callback) const;
   bool GpuAccessAllowed(std::string* reason) const;
   void RequestCompleteGpuInfoIfNeeded();
   bool IsEssentialGpuInfoAvailable() const;
   bool IsCompleteGpuInfoAvailable() const;
   void RequestVideoMemoryUsageStatsUpdate() const;
@@ skipping 231 matching lines @@
   bool finalized_;
 
   std::string disabled_extensions_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuDataManagerImplPrivate);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GPU_GPU_DATA_MANAGER_IMPL_PRIVATE_H_