Fix the handling of user gestures for external protocol handler dialogs.

chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc

Index: chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc
diff --git a/chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc b/chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc
index c1c3126aeb2ebea3d48ad7c647155def0966a120..5ab96dc139bd14eed0e277aa0d5acb4ffc247257 100644
--- a/chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc
+++ b/chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc
@@ -198,7 +198,8 @@ void SendExecuteMimeTypeHandlerEvent(scoped_ptr<content::StreamHandle> stream,
       extension_id, web_contents, stream.Pass(), expected_content_size);
 }
 
-void LaunchURL(const GURL& url, int render_process_id, int render_view_id) {
+void LaunchURL(const GURL& url, int render_process_id, int render_view_id,
+               bool user_gesture) {
   // If there is no longer a WebContents, the request may have raced with tab
   // closing. Don't fire the external request. (It may have been a prerender.)
   content::WebContents* web_contents =
@@ -215,6 +216,9 @@ void LaunchURL(const GURL& url, int render_process_id, int render_view_id) {
     return;
   }
 
+  scoped_ptr<ExternalProtocolHandler::ScopedUserGesture> scoped_gesture;
+  if (user_gesture)
+    scoped_gesture.reset(new ExternalProtocolHandler::ScopedUserGesture);
   ExternalProtocolHandler::LaunchUrlWithDelegate(
       url, render_process_id, render_view_id,
       g_external_protocol_handler_delegate);
@@ -441,7 +445,7 @@ ResourceDispatcherHostLoginDelegate*
 }
 
 bool ChromeResourceDispatcherHostDelegate::HandleExternalProtocol(
-    const GURL& url, int child_id, int route_id) {
+    const GURL& url, int child_id, int route_id, bool user_gesture) {
 #if defined(OS_ANDROID)
   // Android use a resource throttle to handle external as well as internal
   // protocols.
@@ -457,7 +461,7 @@ bool ChromeResourceDispatcherHostDelegate::HandleExternalProtocol(
 
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
-      base::Bind(&LaunchURL, url, child_id, route_id));
+      base::Bind(&LaunchURL, url, child_id, route_id, user_gesture));
   return true;
 #endif
 }