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

content/browser/frame_host/render_frame_host_manager.h

Index: content/browser/frame_host/render_frame_host_manager.h
diff --git a/content/browser/frame_host/render_frame_host_manager.h b/content/browser/frame_host/render_frame_host_manager.h
index 4ca45465a893d4baef082852fc331a7f6a924c31..bfbc35315fdc5f32d7e137e937486b2c042bd10f 100644
--- a/content/browser/frame_host/render_frame_host_manager.h
+++ b/content/browser/frame_host/render_frame_host_manager.h
@@ -45,6 +45,21 @@ class TestWebContents;
 class WebUIImpl;
 struct NavigationBeforeCommitInfo;
 
+// Flag arguments for RenderFrameHostManager::CreateRenderFrame.
+enum CreateRenderFrameFlags {
+  // Used for creation of a swapped out RenderFrame.
+  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
+};
+
 // Manages RenderFrameHosts for a FrameTreeNode.  This class acts as a state
 // machine to make cross-process navigations in a frame possible.
 class CONTENT_EXPORT RenderFrameHostManager : public NotificationObserver {
@@ -257,9 +272,7 @@ class CONTENT_EXPORT RenderFrameHostManager : public NotificationObserver {
   // Returns the routing id of the *view* associated with the frame.
   int CreateRenderFrame(SiteInstance* instance,
                         int opener_route_id,
-                        bool swapped_out,
-                        bool for_main_frame_navigation,
-                        bool hidden);
+                        int flags);
 
   // Helper method to create and initialize a RenderFrameProxyHost and return
   // its routing id.