Convert string16 to base::string16 in content.

content/public/browser/web_contents_delegate.h

Index: content/public/browser/web_contents_delegate.h
diff --git a/content/public/browser/web_contents_delegate.h b/content/public/browser/web_contents_delegate.h
index 18bd9ef869d00168d170576c58c81cbb2d34e588..81faa6bf90a4b75523215dbbe63692ff531c8b19 100644
--- a/content/public/browser/web_contents_delegate.h
+++ b/content/public/browser/web_contents_delegate.h
@@ -182,9 +182,9 @@ class CONTENT_EXPORT WebContentsDelegate {
   // will be used for the message.
   virtual bool AddMessageToConsole(WebContents* source,
                                    int32 level,
-                                   const string16& message,
+                                   const base::string16& message,
                                    int32 line_no,
-                                   const string16& source_id);
+                                   const base::string16& source_id);
 
   // Tells us that we've finished firing this tab's beforeunload event.
   // The proceed bool tells us whether the user chose to proceed closing the
@@ -298,7 +298,7 @@ class CONTENT_EXPORT WebContentsDelegate {
       WebContents* web_contents,
       int route_id,
       WindowContainerType window_container_type,
-      const string16& frame_name,
+      const base::string16& frame_name,
       const GURL& target_url,
       const std::string& partition_id,
       SessionStorageNamespace* session_storage_namespace);
@@ -307,7 +307,7 @@ class CONTENT_EXPORT WebContentsDelegate {
   // typically happens when popups are created.
   virtual void WebContentsCreated(WebContents* source_contents,
                                   int64 source_frame_id,
-                                  const string16& frame_name,
+                                  const base::string16& frame_name,
                                   const GURL& target_url,
                                   WebContents* new_contents) {}
 
@@ -371,7 +371,7 @@ class CONTENT_EXPORT WebContentsDelegate {
   virtual void RegisterProtocolHandler(WebContents* web_contents,
                                        const std::string& protocol,
                                        const GURL& url,
-                                       const string16& title,
+                                       const base::string16& title,
                                        bool user_gesture) {}
 
   // Result of string search in the page. This includes the number of matches