Add base:: to string16s in android_webview/.

android_webview/browser/aw_javascript_dialog_manager.cc

Index: android_webview/browser/aw_javascript_dialog_manager.cc
diff --git a/android_webview/browser/aw_javascript_dialog_manager.cc b/android_webview/browser/aw_javascript_dialog_manager.cc
index 1690eac737267bf783518d26f797a974dfb6f8c3..630c7bfd7af03df9a97e5f78c64ebcf21fbb755f 100644
--- a/android_webview/browser/aw_javascript_dialog_manager.cc
+++ b/android_webview/browser/aw_javascript_dialog_manager.cc
@@ -19,8 +19,8 @@ void AwJavaScriptDialogManager::RunJavaScriptDialog(
     const GURL& origin_url,
     const std::string& accept_lang,
     content::JavaScriptMessageType message_type,
-    const string16& message_text,
-    const string16& default_prompt_text,
+    const base::string16& message_text,
+    const base::string16& default_prompt_text,
     const DialogClosedCallback& callback,
     bool* did_suppress_message) {
   AwContentsClientBridgeBase* bridge =
@@ -34,7 +34,7 @@ void AwJavaScriptDialogManager::RunJavaScriptDialog(
 
 void AwJavaScriptDialogManager::RunBeforeUnloadDialog(
     content::WebContents* web_contents,
-    const string16& message_text,
+    const base::string16& message_text,
     bool is_reload,
     const DialogClosedCallback& callback) {
   AwContentsClientBridgeBase* bridge =