Move ThreeDAPIObserver from chrome/browser to chrome/browser/gpu.

chrome/browser/gpu/three_d_api_observer.h

Index: chrome/browser/gpu/three_d_api_observer.h
diff --git a/chrome/browser/three_d_api_observer.h b/chrome/browser/gpu/three_d_api_observer.h
similarity index 81%
rename from chrome/browser/three_d_api_observer.h
rename to chrome/browser/gpu/three_d_api_observer.h
index b1a76fa457408d21973a593fcb74f8a641f97865..c662adba5735f889a095bfba947a8a8681677521 100644
--- a/chrome/browser/three_d_api_observer.h
+++ b/chrome/browser/gpu/three_d_api_observer.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_BROWSER_THREE_D_API_OBSERVER_H_
-#define CHROME_BROWSER_THREE_D_API_OBSERVER_H_
+#ifndef CHROME_BROWSER_GPU_THREE_D_API_OBSERVER_H_
+#define CHROME_BROWSER_GPU_THREE_D_API_OBSERVER_H_
 
 #include "base/compiler_specific.h"
 #include "content/public/browser/gpu_data_manager_observer.h"
@@ -22,4 +22,4 @@ class ThreeDAPIObserver : public content::GpuDataManagerObserver {
   DISALLOW_COPY_AND_ASSIGN(ThreeDAPIObserver);
 };
 
-#endif  // CHROME_BROWSER_THREE_D_API_OBSERVER_H_
+#endif  // CHROME_BROWSER_GPU_THREE_D_API_OBSERVER_H_