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

When a RenderFrameHost is created for an out-of-process iframe, it
will create a RenderWidgetHost to manage rendering and input events for
the iframe and its same-process frame descendants. A corresponding
RenderWidget is created in the renderer process.

BUG=419087

Committed: https://crrev.com/2dfb76d84f4ebde602c1c3cde700dcf71b4d1bd6
Cr-Commit-Position: refs/heads/master@{#312451}

Review URL: https://codereview.chromium.org/616133002

Cr-Commit-Position: refs/heads/master@{#312702}

1 files changed, 12 insertions, 1 deletions

diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index c543d9b..463d330 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -44,6 +44,7 @@ class GURL;
 class TransportDIB;
 struct FrameHostMsg_AddNavigationTransitionData_Params;
 struct FrameMsg_Navigate_Params;
+struct FrameMsg_NewFrame_WidgetParams;
 struct FrameMsg_RequestNavigation_Params;
 
 namespace blink {
@@ -72,6 +73,7 @@ class WebEncryptedMediaClientImpl;
 namespace content {
 
 class ChildFrameCompositingHelper;
+class CompositorDependencies;
 class ExternalPopupMenu;
 class GeolocationDispatcher;
 class ManifestManager;
@@ -125,7 +127,9 @@ class CONTENT_EXPORT RenderFrameImpl
   static void CreateFrame(int routing_id,
                           int parent_routing_id,
                           int proxy_routing_id,
-                          const FrameReplicationState& replicated_state);
+                          const FrameReplicationState& replicated_state,
+                          CompositorDependencies* compositor_deps,
+                          const FrameMsg_NewFrame_WidgetParams& params);
 
   // Returns the RenderFrameImpl for the given routing ID.
   static RenderFrameImpl* FromRoutingID(int routing_id);
@@ -742,6 +746,13 @@ class CONTENT_EXPORT RenderFrameImpl
   // TODO(creis): Remove this after switching to PlzNavigate.
   int proxy_routing_id_;
 
+  // Used when the RenderFrame is a local root. For now, RenderWidgets are
+  // added only when a child frame is in a different process from its parent
+  // frame, but eventually this will also apply to top-level frames.
+  // TODO(kenrb): Correct the above statement when top-level frames have their
+  // own RenderWidgets.
+  scoped_refptr<RenderWidget> render_widget_;
+
 #if defined(ENABLE_PLUGINS)
   // Current text input composition text. Empty if no composition is in
   // progress.