adds WARP support to Chromium, for Metro mode only, on Windows 8

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 76 matching lines @@
   // decision.
   virtual void SetGLStrings(const std::string& gl_vendor,
                             const std::string& gl_renderer,
                             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;
 
+  // Tells the data manager that it should use WARP software rendering on
+  // Windows. This state will persist between program runs.
+  virtual void SetShouldUseWarp(bool use_warp) = 0;
+
+  // Returns current state about WARP, which may be due to command-line
+  // arguments or saved state.
+  virtual bool ShouldUseWarp() const = 0;
+
   // Turn off all hardware acceleration.
   virtual void DisableHardwareAcceleration() = 0;
 
   // Whether the browser compositor can be used.
   virtual bool CanUseGpuBrowserCompositor() const = 0;
 
  protected:
   virtual ~GpuDataManager() {}
 };
 
 };  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_GPU_DATA_MANAGER_H_