Add new extension APIs related to animation policy.

content/browser/accessibility/browser_accessibility_state_impl.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_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_STATE_IMPL_H_
 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_STATE_IMPL_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 32 matching lines @@
   void EnableAccessibility() override;
   void DisableAccessibility() override;
   void ResetAccessibilityMode() override;
   void OnScreenReaderDetected() override;
   bool IsAccessibleBrowser() override;
   void AddHistogramCallback(base::Closure callback) override;
 
   void UpdateHistogramsForTesting() override;
 
   AccessibilityMode accessibility_mode() const { return accessibility_mode_; };
+  const std::string& GetImageAnimationPolicy() const override;
+  void SetImageAnimationPolicy(const std::string& policy) override;
 
   // Adds the given accessibility mode to the current accessibility mode bitmap.
   void AddAccessibilityMode(AccessibilityMode mode);
 
   // Removes the given accessibility mode from the current accessibility mode
   // bitmap, managing the bits that are shared with other modes such that a
   // bit will only be turned off when all modes that depend on it have been
   // removed.
   void RemoveAccessibilityMode(AccessibilityMode mode);
 
@@ skipping 11 matching lines @@
   // Leaky singleton, destructor generally won't be called.
   ~BrowserAccessibilityStateImpl() override;
 
   void UpdatePlatformSpecificHistograms();
 
   // Updates the accessibility mode of all web contents, including swapped out
   // ones. |add| specifies whether the mode should be added or removed.
   void AddOrRemoveFromAllWebContents(AccessibilityMode mode, bool add);
 
   AccessibilityMode accessibility_mode_;
+  std::string animation_policy_;
 
   std::vector<base::Closure> histogram_callbacks_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityStateImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_STATE_IMPL_H_