Remove JS dialog dependency from content.

chrome/browser/ui/browser.cc

Index: chrome/browser/ui/browser.cc
diff --git a/chrome/browser/ui/browser.cc b/chrome/browser/ui/browser.cc
index 2a71f6c120ebec733a1871f7550cbf3ac8e80c43..e6b402a555da5b89acaaded0f0c8ef70d03da88b 100644
--- a/chrome/browser/ui/browser.cc
+++ b/chrome/browser/ui/browser.cc
@@ -73,6 +73,7 @@
 #include "chrome/browser/tab_contents/simple_alert_infobar_delegate.h"
 #include "chrome/browser/tabs/tab_finder.h"
 #include "chrome/browser/tabs/tab_strip_model.h"
+#include "chrome/browser/ui/app_modal_dialogs/message_box_handler.h"
 #include "chrome/browser/ui/blocked_content/blocked_content_tab_helper.h"
 #include "chrome/browser/ui/bookmarks/bookmark_tab_helper.h"
 #include "chrome/browser/ui/browser_dialogs.h"
@@ -3422,6 +3423,10 @@ void Browser::DidNavigateMainFramePostCommit(
   }
 }
 
+content::JavaScriptDialogCreator* Browser::GetJavaScriptDialogCreator() {
+  return GetJavaScriptDialogCreatorInstance();
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 // Browser, TabContentsWrapperDelegate implementation: