Adds paste function to searchbox api and handles paste event on fakebox

chrome/renderer/searchbox/searchbox.h

Index: chrome/renderer/searchbox/searchbox.h
diff --git a/chrome/renderer/searchbox/searchbox.h b/chrome/renderer/searchbox/searchbox.h
index b4743c980a880848ccdc403f93eb5c86e8a4ff09..685c3cb72ebb77e904bf7cf1dcd410a3c665c225 100644
--- a/chrome/renderer/searchbox/searchbox.h
+++ b/chrome/renderer/searchbox/searchbox.h
@@ -71,6 +71,9 @@ class SearchBox : public content::RenderViewObserver,
                      WindowOpenDisposition disposition,
                      bool is_search_type);
 
+  // Sends ChromeViewHostMsg_SearchBoxPaste to the browser.
+  void Paste(const string16& text);
+
   const ThemeBackgroundInfo& GetThemeBackgroundInfo();
 
   // Sends ChromeViewHostMsg_SetVoiceSearchSupported to the browser.