Move WebUI ownership from the RenderFrameHostManager to the RenderFrameHost.

content/browser/frame_host/render_frame_host_impl.h

Index: content/browser/frame_host/render_frame_host_impl.h
diff --git a/content/browser/frame_host/render_frame_host_impl.h b/content/browser/frame_host/render_frame_host_impl.h
index c2bc78d2f8ddea0e3597663fdea3163210e36d68..b184321be670841ba1343397d215a7be2b7a8c9b 100644
--- a/content/browser/frame_host/render_frame_host_impl.h
+++ b/content/browser/frame_host/render_frame_host_impl.h
@@ -16,6 +16,7 @@
 #include "base/time/time.h"
 #include "content/browser/accessibility/browser_accessibility_manager.h"
 #include "content/browser/site_instance_impl.h"
+#include "content/browser/webui/web_ui_impl.h"
 #include "content/common/accessibility_mode_enums.h"
 #include "content/common/ax_content_node_data.h"
 #include "content/common/content_export.h"
@@ -214,6 +215,12 @@ class CONTENT_EXPORT RenderFrameHostImpl
   RenderFrameHostDelegate* delegate() { return delegate_; }
   FrameTreeNode* frame_tree_node() { return frame_tree_node_; }
 
+  // Returns the associated WebUI or null if none applies.
+  WebUIImpl* web_ui() const { return web_ui_.get(); }
+
+  // Returns the associated WebUI type.
+  WebUI::TypeID web_ui_type() const { return web_ui_type_; }
+
   // Returns this RenderFrameHost's loading state. This method is only used by
   // FrameTreeNode. The proper way to check whether a frame is loading is to
   // call FrameTreeNode::IsLoading.
@@ -469,6 +476,15 @@ class CONTENT_EXPORT RenderFrameHostImpl
   // addition, its associated RenderWidgetHost has to be focused.
   bool IsFocused();
 
+  // Updates the WebUI data of this RenderFrameHost based on the
+  // provided |dest_url|, setting to either none, a new instance or reuses the
+  // current active one. Returns true if there was a change of WebUI.
+  // If this is a history navigation its NavigationEntry bindings should be
+  // provided through |entry_bindings| to allow verifying that they are not
+  // being set differently this time around. Otherwise |entry_bindings| should
+  // be set to NavigationEntryImpl::kInvalidBindings so that no checks are made.
+  bool UpdateWebUI(const GURL& dest_url, int entry_bindings);
+
   // Returns the Mojo ImageDownloader service.
   const image_downloader::ImageDownloaderPtr& GetMojoImageDownloader();
 
@@ -628,6 +644,9 @@ class CONTENT_EXPORT RenderFrameHostImpl
       const content::StartNavigationParams& start_params,
       const content::RequestNavigationParams& request_params);
 
+  // Resets all active and pending WebUI related fields.
+  void ResetWebUI();
+
   // For now, RenderFrameHosts indirectly keep RenderViewHosts alive via a
   // refcount that calls Shutdown when it reaches zero.  This allows each
   // RenderFrameHostManager to just care about RenderFrameHosts, while ensuring
@@ -796,6 +815,12 @@ class CONTENT_EXPORT RenderFrameHostImpl
   // NavigationHandle for it is owned by the NavigationRequest.
   scoped_ptr<NavigationHandleImpl> navigation_handle_;
 
+  // The associated WebUIImpl and its type. They will be set if the current
+  // document is from WebUI source. Otherwise they will be null and
+  // WebUI::kNoWebUI, respectively.
+  scoped_ptr<WebUIImpl> web_ui_;
+  WebUI::TypeID web_ui_type_;
+
   // NOTE: This must be the last member.
   base::WeakPtrFactory<RenderFrameHostImpl> weak_ptr_factory_;