Move some accessibility methods, enums and interfaces into the content/public API.

content/public/browser/browser_accessibility_state.h

Index: content/public/browser/browser_accessibility_state.h
diff --git a/content/public/browser/browser_accessibility_state.h b/content/public/browser/browser_accessibility_state.h
index 16cf706d3867dbd6980bd406224fa9fc4ddca612..10766d3b9aec526de140e92cb277191ef5588507 100644
--- a/content/public/browser/browser_accessibility_state.h
+++ b/content/public/browser/browser_accessibility_state.h
@@ -29,6 +29,9 @@ class CONTENT_EXPORT BrowserAccessibilityState {
   // Returns true if the browser should be customized for accessibility.
   virtual bool IsAccessibleBrowser() = 0;
 
+  virtual bool GetAccessibilityEnabled() = 0;

[dmazzoni, 2013/02/27 16:41:01]

Make GetAccessibilityMode virtual instead.

[aboxhall, 2013/02/27 18:58:50]

Done.

+  virtual void SetAccessibilityEnabled(bool enabled) = 0;
+
   // Add a callback method that will be called once, a small while after the
   // browser starts up, when accessibility state histograms are updated.
   // Use this to register a method to update additional accessibility