Move out DidStartProvisionalLoad from WebContentsImpl into Navigator.

content/browser/frame_host/interstitial_page_impl.cc

Index: content/browser/frame_host/interstitial_page_impl.cc
diff --git a/content/browser/frame_host/interstitial_page_impl.cc b/content/browser/frame_host/interstitial_page_impl.cc
index 8b249e924ecc4b3d9e983a937c61a4e2400424af..0fcbc1790405a0aaee031b4fccf8bbaeaf85d23a 100644
--- a/content/browser/frame_host/interstitial_page_impl.cc
+++ b/content/browser/frame_host/interstitial_page_impl.cc
@@ -795,6 +795,25 @@ void InterstitialPageImpl::TakeActionOnResourceDispatcher(
           action));
 }
 
+void InterstitialPageImpl::DidStartProvisionalLoad(
+      RenderFrameHostImpl* render_frame_host,
+      int64 frame_id,
+      int64 parent_frame_id,
+      bool is_main_frame,
+      const GURL& validated_url,
+      bool is_error_page,
+      bool is_iframe_srcdoc) {
+}
+
+void InterstitialPageImpl::NotifyProvisionalChangeToMainFrameUrl(
+      RenderFrameHostImpl* render_frame_host,
+      const GURL& url) {
+}
+
+void InterstitialPageImpl::NotifyNavigationStateChanged(
+    unsigned changed_flags) {
+}
+
 InterstitialPageImpl::InterstitialPageRVHDelegateView::
     InterstitialPageRVHDelegateView(InterstitialPageImpl* page)
     : interstitial_page_(page) {