Switch AccessibilityMode to be a bitmap

content/browser/accessibility/browser_accessibility_state_impl.h

Index: content/browser/accessibility/browser_accessibility_state_impl.h
diff --git a/content/browser/accessibility/browser_accessibility_state_impl.h b/content/browser/accessibility/browser_accessibility_state_impl.h
index 3098341ef25efeb46fef8762a7e1d3512e5fad86..fc41ef74ed085f8180fbf98549c175b2e6b61bcb 100644
--- a/content/browser/accessibility/browser_accessibility_state_impl.h
+++ b/content/browser/accessibility/browser_accessibility_state_impl.h
@@ -10,7 +10,6 @@
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/singleton.h"
-#include "content/common/view_message_enums.h"
 #include "content/public/browser/browser_accessibility_state.h"
 
 namespace content {
@@ -48,8 +47,8 @@ class CONTENT_EXPORT BrowserAccessibilityStateImpl
 
   virtual void UpdateHistogramsForTesting() OVERRIDE;
 
-  AccessibilityMode accessibility_mode() const { return accessibility_mode_; };
-  void SetAccessibilityMode(AccessibilityMode mode);
+  unsigned int accessibility_mode() const { return accessibility_mode_; };
+  void SetAccessibilityMode(unsigned int mode);
 
  private:
   friend class base::RefCountedThreadSafe<BrowserAccessibilityStateImpl>;
@@ -64,7 +63,7 @@ class CONTENT_EXPORT BrowserAccessibilityStateImpl
 
   void UpdatePlatformSpecificHistograms();
 
-  AccessibilityMode accessibility_mode_;
+  unsigned int accessibility_mode_;
 
   std::vector<base::Closure> histogram_callbacks_;