Improve extension icon prediction

chrome/browser/extensions/extension_action_manager.h

Index: chrome/browser/extensions/extension_action_manager.h
diff --git a/chrome/browser/extensions/extension_action_manager.h b/chrome/browser/extensions/extension_action_manager.h
index b78e8a2bd8600e9674b291cd08ac3f9fa19ad13e..e81492c668853dafa98856ef38ffe3a3e6027436 100644
--- a/chrome/browser/extensions/extension_action_manager.h
+++ b/chrome/browser/extensions/extension_action_manager.h
@@ -9,6 +9,7 @@
 #include <string>
 
 #include "base/scoped_observer.h"
+#include "chrome/common/extensions/api/extension_action/action_info.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "extensions/browser/extension_registry_observer.h"
 
@@ -41,6 +42,11 @@ class ExtensionActionManager : public KeyedService,
   ExtensionAction* GetSystemIndicator(
       const extensions::Extension& extension) const;
 
+  // Gets the best fit ExtensionAction for the given |extension|.
+  scoped_ptr<ExtensionAction> GetBestFitAction(
+      const extensions::Extension& extension,
+      extensions::ActionInfo::Type type) const;
+
  private:
   // Implement ExtensionRegistryObserver.
   virtual void OnExtensionUnloaded(content::BrowserContext* browser_context,