Move out DidStartProvisionalLoad from WebContentsImpl into Navigator.

content/test/test_render_frame_host.cc

Index: content/test/test_render_frame_host.cc
diff --git a/content/test/test_render_frame_host.cc b/content/test/test_render_frame_host.cc
index 263eb454b8c140e53989e0317991d8e6599d9b54..57f8c0fe5122ac564bb1d3b413380759177eaa69 100644
--- a/content/test/test_render_frame_host.cc
+++ b/content/test/test_render_frame_host.cc
@@ -9,11 +9,13 @@ namespace content {
 TestRenderFrameHost::TestRenderFrameHost(RenderViewHostImpl* render_view_host,
                                          RenderFrameHostDelegate* delegate,
                                          FrameTree* frame_tree,
+                                         FrameTreeNode* frame_tree_node,
                                          int routing_id,
                                          bool is_swapped_out)
     : RenderFrameHostImpl(render_view_host,
                           delegate,
                           frame_tree,
+                          frame_tree_node,
                           routing_id,
                           is_swapped_out) {}