[Android] Add supportMultipleWindows setting

content/renderer/render_view_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/bind.h"
@@ skipping 2346 matching lines @@
 }
 
 // We are supposed to get a single call to Show for a newly created RenderView
 // that was created via RenderViewImpl::CreateWebView.  So, we wait until this
 // point to dispatch the ShowView message.
 //
 // This method provides us with the information about how to display the newly
 // created RenderView (i.e., as a blocked popup or as a new tab).
 //
 void RenderViewImpl::show(WebNavigationPolicy policy) {
-  DCHECK(!did_show_) << "received extraneous Show call";
+  if (did_show_) {
+#if defined(OS_ANDROID)
+    // When supports_multiple_windows is disabled, popups are reusing
+    // the same view. In some scenarios, this makes WebKit to call show() twice.
+    if (!webkit_preferences_.supports_multiple_windows)
+      return;
+#endif
+    NOTREACHED() << "received extraneous Show call";
+    return;
+  }
+  did_show_ = true;
+
   DCHECK(opener_id_ != MSG_ROUTING_NONE);
 
-  if (did_show_)
-    return;
-  did_show_ = true;
-
   if (GetContentClient()->renderer()->AllowPopup(creator_url_))
     opened_by_user_gesture_ = true;
 
   // Force new windows to a popup if they were not opened with a user gesture.
   if (!opened_by_user_gesture_) {
     // We exempt background tabs for compat with older versions of Chrome.
     // TODO(darin): This seems bogus.  These should have a user gesture, so
     // we probably don't need this check.
     if (policy != WebKit::WebNavigationPolicyNewBackgroundTab)
       policy = WebKit::WebNavigationPolicyNewPopup;
@@ skipping 3954 matching lines @@
 }
 #endif
 
 void RenderViewImpl::OnReleaseDisambiguationPopupDIB(
     TransportDIB::Handle dib_handle) {
   TransportDIB* dib = TransportDIB::CreateWithHandle(dib_handle);
   RenderProcess::current()->ReleaseTransportDIB(dib);
 }
 
 }  // namespace content