Fix window.open issue in Document mode on Android.

content/public/browser/web_contents.h

Index: content/public/browser/web_contents.h
diff --git a/content/public/browser/web_contents.h b/content/public/browser/web_contents.h
index 43804129322c4ed56ffc7b451c6ae1e5b84bfc2d..4879f640ef6bea204c5368139d7ad73a2dd1d2fd 100644
--- a/content/public/browser/web_contents.h
+++ b/content/public/browser/web_contents.h
@@ -632,6 +632,10 @@ class WebContents : public PageNavigator,
   CONTENT_EXPORT static WebContents* FromJavaWebContents(
       jobject jweb_contents_android);
   virtual base::android::ScopedJavaLocalRef<jobject> GetJavaWebContents() = 0;
+
+  // Used in DocumentMode to resume loading contents created in new window after
+  // asynchronous initialization of a new activity and tab.
+  virtual void ResumeLoadingCreatedWebContents() = 0;
 #elif defined(OS_MACOSX)
   // Allowing other views disables optimizations which assume that only a single
   // WebContents is present.