Add methods to NavigationHandle to allow refactoring webNavigation to use it.

content/public/browser/navigation_handle.cc

Index: content/public/browser/navigation_handle.cc
diff --git a/content/public/browser/navigation_handle.cc b/content/public/browser/navigation_handle.cc
index 4926947a2e926cde7b3f25ea96bc20ae22680377..857e17d74f9c6589ce3e313ac4150bb200569e4f 100644
--- a/content/public/browser/navigation_handle.cc
+++ b/content/public/browser/navigation_handle.cc
@@ -27,6 +27,8 @@ scoped_ptr<NavigationHandle> NavigationHandle::CreateNavigationHandleForTesting(
   scoped_ptr<NavigationHandleImpl> handle_impl = NavigationHandleImpl::Create(
       url,
       static_cast<RenderFrameHostImpl*>(render_frame_host)->frame_tree_node(),
+      false,  // is_synchronous
+      false,  // is_srcdoc
       base::TimeTicks::Now());
   return scoped_ptr<NavigationHandle>(std::move(handle_impl));
 }