Convert string16 to base::string16 in content.

content/shell/browser/shell_javascript_dialog.h

Index: content/shell/browser/shell_javascript_dialog.h
diff --git a/content/shell/browser/shell_javascript_dialog.h b/content/shell/browser/shell_javascript_dialog.h
index 4001334c788fdde535e342b7dc7fe519df247db8..233296bdad2c170eb719180fd7b6ccb35700cd01 100644
--- a/content/shell/browser/shell_javascript_dialog.h
+++ b/content/shell/browser/shell_javascript_dialog.h
@@ -29,8 +29,8 @@ class ShellJavaScriptDialog {
       ShellJavaScriptDialogManager* manager,
       gfx::NativeWindow parent_window,
       JavaScriptMessageType message_type,
-      const string16& message_text,
-      const string16& default_prompt_text,
+      const base::string16& message_text,
+      const base::string16& default_prompt_text,
       const JavaScriptDialogManager::DialogClosedCallback& callback);
   ~ShellJavaScriptDialog();
 
@@ -46,8 +46,8 @@ class ShellJavaScriptDialog {
 #elif defined(OS_WIN)
   JavaScriptMessageType message_type_;
   HWND dialog_win_;
-  string16 message_text_;
-  string16 default_prompt_text_;
+  base::string16 message_text_;
+  base::string16 default_prompt_text_;
   static INT_PTR CALLBACK DialogProc(HWND dialog, UINT message, WPARAM wparam,
                                      LPARAM lparam);
 #elif defined(TOOLKIT_GTK)