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 0f8e555d30cbc4f01c1ee17cd969278044a0de4e..f9a7a92213a894253376e1c8e0417e778875c48b 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"
@@ -163,6 +164,11 @@ class CONTENT_EXPORT RenderFrameHostDelegate {
   // https://crbug.com/330264.
   virtual void EnsureOpenerProxiesExist(RenderFrameHost* source_rfh) {}
 
+  // Creates a WebUI object for a main frame navigating to the given URL. If no
+  // WebUI applies, returns nullptr. Ownership of the returned pointer will be
+  // passed to the caller.
+  virtual scoped_ptr<WebUIImpl> CreateMainFrameWebUI(const GURL& url);

[carlosk, 2015/09/30 19:37:27]

This seemed an appropriate name for this already a method named
WebContentsImpl::CreateSubframeWebUI. But I realized later this might be called
for subframes as well so I'll rename it in the next patch set.

+
 #if defined(OS_WIN)
   // Returns the frame's parent's NativeViewAccessible.
   virtual gfx::NativeViewAccessible GetParentNativeViewAccessible();