Add base:: to string16s in android_webview/.

android_webview/browser/aw_contents_client_bridge_base.h

Index: android_webview/browser/aw_contents_client_bridge_base.h
diff --git a/android_webview/browser/aw_contents_client_bridge_base.h b/android_webview/browser/aw_contents_client_bridge_base.h
index 3166f6be314590bb7121615d4cffe9fb3f01a06e..0383a377b2a22590568ada80e721a0fd3a18d091 100644
--- a/android_webview/browser/aw_contents_client_bridge_base.h
+++ b/android_webview/browser/aw_contents_client_bridge_base.h
@@ -47,14 +47,14 @@ class AwContentsClientBridgeBase {
   virtual void RunJavaScriptDialog(
       content::JavaScriptMessageType message_type,
       const GURL& origin_url,
-      const string16& message_text,
-      const string16& default_prompt_text,
+      const base::string16& message_text,
+      const base::string16& default_prompt_text,
       const content::JavaScriptDialogManager::DialogClosedCallback& callback)
       = 0;
 
   virtual void RunBeforeUnloadDialog(
       const GURL& origin_url,
-      const string16& message_text,
+      const base::string16& message_text,
       const content::JavaScriptDialogManager::DialogClosedCallback& callback)
       = 0;