Extract minimal RenderViewHost interface for embedders, leaving

content/browser/tab_contents/web_contents_view_mac.mm

Index: content/browser/tab_contents/web_contents_view_mac.mm
diff --git a/content/browser/tab_contents/web_contents_view_mac.mm b/content/browser/tab_contents/web_contents_view_mac.mm
index 27a0341bd9651b3436a51a16838b2504a820d5b4..b036e43c94a5034964ca6860cf7b334173641cc4 100644
--- a/content/browser/tab_contents/web_contents_view_mac.mm
+++ b/content/browser/tab_contents/web_contents_view_mac.mm
@@ -93,14 +93,14 @@ void WebContentsViewMac::CreateView(const gfx::Size& initial_size) {
 
 RenderWidgetHostView* WebContentsViewMac::CreateViewForWidget(
     RenderWidgetHost* render_widget_host) {
-  if (render_widget_host->view()) {
+  if (render_widget_host->GetView()) {
     // During testing, the view will already be set up in most cases to the
     // test view, so we don't want to clobber it with a real one. To verify that
     // this actually is happening (and somebody isn't accidentally creating the
     // view twice), we check for the RVH Factory, which will be set when we're
     // making special ones (which go along with the special views).
     DCHECK(RenderViewHostFactory::has_factory());
-    return render_widget_host->view();
+    return render_widget_host->GetView();
   }
 
   RenderWidgetHostViewMac* view = static_cast<RenderWidgetHostViewMac*>(