Make browser_handles_top_level_requests synchronous.

chrome/browser/external_tab/external_tab_container_win.h

Index: chrome/browser/external_tab/external_tab_container_win.h
diff --git a/chrome/browser/external_tab/external_tab_container_win.h b/chrome/browser/external_tab/external_tab_container_win.h
index ed6f20fa92b4bbf47efcf880e2cbd91a701d7bd4..4a66a109835b89a8a5040277be6dbf940b91c462 100644
--- a/chrome/browser/external_tab/external_tab_container_win.h
+++ b/chrome/browser/external_tab/external_tab_container_win.h
@@ -24,6 +24,7 @@
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/browser/web_contents_observer.h"
+#include "content/public/common/referrer.h"
 #include "ui/base/accelerators/accelerator.h"
 #include "ui/views/widget/native_widget_win.h"
 
@@ -122,6 +123,13 @@ class ExternalTabContainer : public content::WebContentsDelegate,
   virtual content::WebContents* OpenURLFromTab(
       content::WebContents* source,
       const content::OpenURLParams& params) OVERRIDE;
+  virtual bool ShouldIgnoreNavigation(
+      content::WebContents* source,
+      const GURL& url,
+      const content::Referrer& referrer,
+      WindowOpenDisposition disposition,
+      bool is_content_initiated,
+      content::PageTransition transition_type) OVERRIDE;
   virtual void NavigationStateChanged(const content::WebContents* source,
                                       unsigned changed_flags) OVERRIDE;
   virtual void AddNewContents(content::WebContents* source,
@@ -280,6 +288,13 @@ class ExternalTabContainer : public content::WebContentsDelegate,
   // Creates and initializes the view hierarchy for this ExternalTabContainer.
   void SetupExternalTabView();
 
+  // Send a URL open request to the external host.
+  content::WebContents* OpenUrlInExtenalHost(
+      content::WebContents* source,
+      const GURL& url,
+      WindowOpenDisposition disposition,
+      const content::Referrer& referrer);
+
   scoped_ptr<TabContentsWrapper> tab_contents_;
   scoped_refptr<AutomationProvider> automation_;
 
@@ -322,6 +337,11 @@ class ExternalTabContainer : public content::WebContentsDelegate,
   // A mapping between accelerators and commands.
   std::map<ui::Accelerator, int> accelerator_table_;
 
+  struct PendingOpenUrlRequest {
+    GURL url;
+    WindowOpenDisposition disposition;
+    content::Referrer referrer;
+  };
   // Top level navigations received for a tab while it is waiting for an ack
   // from the external host go here. Scenario is a window.open executes on a
   // page in ChromeFrame. A new TabContents is created and the current
@@ -333,7 +353,7 @@ class ExternalTabContainer : public content::WebContentsDelegate,
   // attach tab request.
   // Contains the list of URL requests which are pending waiting for an ack
   // from the external host.
-  std::vector<content::OpenURLParams> pending_open_url_requests_;
+  std::vector<PendingOpenUrlRequest> pending_open_url_requests_;
 
   // Set to true if the ExternalTabContainer instance is waiting for an ack
   // from the host.