Refactor the content setting view to allow a subclass for the web intents button.

chrome/browser/ui/views/location_bar/content_setting_image_view.h

Index: chrome/browser/ui/views/location_bar/content_setting_image_view.h
diff --git a/chrome/browser/ui/views/location_bar/content_setting_image_view.h b/chrome/browser/ui/views/location_bar/content_setting_image_view.h
index b542e34174f91cd366c288fd207d6e3fe0f70577..2c6d46cb28c5ca1e30b2e322021dc82dab9f33e2 100644
--- a/chrome/browser/ui/views/location_bar/content_setting_image_view.h
+++ b/chrome/browser/ui/views/location_bar/content_setting_image_view.h
@@ -44,7 +44,7 @@ class ContentSettingImageView
 
   // |new_navigation| true if this is a new navigation, false if the tab was
   // just switched to.
-  void UpdateFromWebContents(content::WebContents* web_contents);
+  void Update(TabContents* tab_contents);
 
   // views::View overrides:
   virtual gfx::Size GetPreferredSize() OVERRIDE;
@@ -60,6 +60,12 @@ class ContentSettingImageView
   // TouchableLocationBarView.
   virtual int GetBuiltInHorizontalPadding() const OVERRIDE;
 
+ protected:
+  virtual SkColor button_border_color() const;
+  virtual SkColor gradient_top_color() const;
+  virtual SkColor gradient_bottom_color() const;
+  virtual void OnClick();
+
  private:
   // views::ImageView overrides:
   virtual bool OnMousePressed(const views::MouseEvent& event) OVERRIDE;