Reland #1 of: Move WebUI ownership from the RenderFrameHostManager to the RenderFrameHost.

content/browser/frame_host/render_frame_host_delegate.h

Index: content/browser/frame_host/render_frame_host_delegate.h
diff --git a/content/browser/frame_host/render_frame_host_delegate.h b/content/browser/frame_host/render_frame_host_delegate.h
index 13f78d9c936f2208f03007c4ec71f5e9e3b291df..f3038fcc567af331e155e05fde765758418ab92f 100644
--- a/content/browser/frame_host/render_frame_host_delegate.h
+++ b/content/browser/frame_host/render_frame_host_delegate.h
@@ -9,6 +9,7 @@
 
 #include "base/basictypes.h"
 #include "base/i18n/rtl.h"
+#include "content/browser/webui/web_ui_impl.h"
 #include "content/common/content_export.h"
 #include "content/common/frame_message_enums.h"
 #include "content/public/browser/site_instance.h"
@@ -172,6 +173,10 @@ class CONTENT_EXPORT RenderFrameHostDelegate {
   // https://crbug.com/330264.
   virtual void EnsureOpenerProxiesExist(RenderFrameHost* source_rfh) {}
 
+  // Creates a WebUI object for a frame navigating to |url|. If no WebUI
+  // applies, returns null.
+  virtual scoped_ptr<WebUIImpl> CreateWebUIForRenderFrameHost(const GURL& url);
+
 #if defined(OS_WIN)
   // Returns the frame's parent's NativeViewAccessible.
   virtual gfx::NativeViewAccessible GetParentNativeViewAccessible();