[Garbled Text][Infobar] Adding infobar to suggest turning on encoding detection.

chrome/renderer/chrome_render_view_observer.h

Index: chrome/renderer/chrome_render_view_observer.h
diff --git a/chrome/renderer/chrome_render_view_observer.h b/chrome/renderer/chrome_render_view_observer.h
index fe97f5d1ab2f1f53338802cb0dbb9eff1893ba7b..8a4d04bd9f8556f6e00e17c4cbae15ea53887635 100644
--- a/chrome/renderer/chrome_render_view_observer.h
+++ b/chrome/renderer/chrome_render_view_observer.h
@@ -138,6 +138,8 @@ class ChromeRenderViewObserver : public content::RenderViewObserver,
   void OnGetFPS();
   void OnAddStrictSecurityHost(const std::string& host);
   void OnSetAsInterstitial();
+  void OnReloadFromCache();
+  void OnSetGarbledTextDetectionEnableState(bool enable);
 
   // Captures the thumbnail and text contents for indexing for the given load
   // ID. If the view's load ID is different than the parameter, this call is
@@ -220,6 +222,9 @@ class ChromeRenderViewObserver : public content::RenderViewObserver,
   // External host exposed through automation controller.
   scoped_ptr<ExternalHostBindings> external_host_bindings_;
 
+  // True if we should run garbled text detection.
+  bool garbled_text_detection_enabled_;
+
   base::WeakPtrFactory<ChromeRenderViewObserver> weak_factory_;
 
   typedef std::vector<linked_ptr<webkit_glue::ImageResourceFetcher> >