Make RenderFrame(Host) own a RenderWidget(Host).

content/browser/frame_host/render_frame_host_impl.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 35 matching lines @@
 namespace content {
 
 class CrossProcessFrameConnector;
 class CrossSiteTransferringRequest;
 class FrameTree;
 class FrameTreeNode;
 class RenderFrameHostDelegate;
 class RenderFrameProxyHost;
 class RenderProcessHost;
 class RenderViewHostImpl;
+class RenderWidgetHostDelegate;
 class RenderWidgetHostImpl;
 class TimeoutMonitor;
 struct ContextMenuParams;
 struct GlobalRequestID;
 struct Referrer;
 struct ShowDesktopNotificationHostMsgParams;
 struct TransitionLayerData;
 
+// Flag arguments for RenderFrameHost creation.
+enum CreateRenderFrameFlags {
+  // The RFH will be initially placed on the swapped out hosts list.
+  SWAPPED_OUT = 1 << 0,
+  // The new RenderFrame is being created for a navigation of the
+  // top-level frame.
+  FOR_MAIN_FRAME_NAVIGATION = 1 << 1,
+  // The RenderFrame is initially hidden.
+  HIDDEN = 1 << 2,
+  // The RenderFrameHost will have a new RenderWidgetHost created and
+  // attached to it. This is used when the RenderFrameHost is the root
+  // of a subtree of frames that are being rendered in the same process.
+  CREATE_RENDER_WIDGET_HOST = 1 << 3
+};
+
 class CONTENT_EXPORT RenderFrameHostImpl
     : public RenderFrameHost,
       public BrowserAccessibilityDelegate {
  public:
   // Keeps track of the state of the RenderFrameHostImpl, particularly with
   // respect to swap out.
   enum RenderFrameHostImplState {
     // The standard state for a RFH handling the communication with an active
     // RenderFrame.
     STATE_DEFAULT = 0,
@@ skipping 86 matching lines @@
   // after they are blocked in RenderWidgetHelper::CreateNewWindow.
   void Init();
 
   int routing_id() const { return routing_id_; }
   void OnCreateChildFrame(int new_routing_id,
                           const std::string& frame_name);
 
   RenderViewHostImpl* render_view_host() { return render_view_host_; }
   RenderFrameHostDelegate* delegate() { return delegate_; }
   FrameTreeNode* frame_tree_node() { return frame_tree_node_; }
-  // TODO(nasko): The RenderWidgetHost will be owned by RenderFrameHost in
-  // the future, so update this accessor to return the right pointer.
+
+  // This is called to create RenderWidgetHosts for out-of-process iframes.
+  void CreateRenderWidgetHost(RenderWidgetHostDelegate* delegate,
+                              bool hidden);
+
+  // This returns the RenderFrameHost's owned RenderWidgetHost if it has one,
+  // or else it returns a pointer to the RenderViewHost (which inherits
+  // RenderWidgetHost).
   RenderWidgetHostImpl* GetRenderWidgetHost();
 
   // This function is called when this is a swapped out RenderFrameHost that
   // lives in the same process as the parent frame. The
   // |cross_process_frame_connector| allows the non-swapped-out
   // RenderFrameHost for a frame to communicate with the parent process
   // so that it may composite drawing data.
   //
   // Ownership is not transfered.
   void set_cross_process_frame_connector(
@@ skipping 163 matching lines @@
 #endif
 
  protected:
   friend class RenderFrameHostFactory;
 
   // TODO(nasko): Remove dependency on RenderViewHost here. RenderProcessHost
   // should be the abstraction needed here, but we need RenderViewHost to pass
   // into WebContentsObserver::FrameDetached for now.
   RenderFrameHostImpl(RenderViewHostImpl* render_view_host,
                       RenderFrameHostDelegate* delegate,
+                      RenderWidgetHostDelegate* rwh_delegate,
                       FrameTree* frame_tree,
                       FrameTreeNode* frame_tree_node,
                       int routing_id,
-                      bool is_swapped_out);
+                      int flags);
 
  private:
   friend class TestRenderFrameHost;
   friend class TestRenderViewHost;
 
   FRIEND_TEST_ALL_PREFIXES(SitePerProcessBrowserTest, CrashSubframe);
 
   // IPC Message handlers.
   void OnAddMessageToConsole(int32 level,
                              const base::string16& message,
@@ skipping 116 matching lines @@
   // The FrameTreeNode which this RenderFrameHostImpl is hosted in.
   FrameTreeNode* frame_tree_node_;
 
   // The mapping of pending JavaScript calls created by
   // ExecuteJavaScript and their corresponding callbacks.
   std::map<int, JavaScriptResultCallback> javascript_callbacks_;
 
   // Map from notification_id to a callback to cancel them.
   std::map<int, base::Closure> cancel_notification_callbacks_;
 
+  // RenderFrameHosts that need management of the rendering and input events
+  // for their frame subtrees require RenderWidgetHosts. This typically
+  // means frames that are rendered in different processes from their parent
+  // frames.
+  // TODO(kenrb): Later this will also be used on the top-level frame.
+  scoped_ptr<RenderWidgetHostImpl> render_widget_host_;
+
   int routing_id_;
 
   // The current state of this RenderFrameHost.
   RenderFrameHostImplState rfh_state_;
 
   // Tracks whether the RenderFrame for this RenderFrameHost has been created in
   // the renderer process.  Currently only used for subframes.
   // TODO(creis): Use this for main frames as well when RVH goes away.
   bool render_frame_created_;
 
@@ skipping 48 matching lines @@
 
   // NOTE: This must be the last member.
   base::WeakPtrFactory<RenderFrameHostImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_