Give the main frame a RenderWidget.

content/renderer/render_widget.cc

 // Copyright (c) 2012 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.
 
 #include "content/renderer/render_widget.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 32 matching lines @@
 #include "content/renderer/gpu/mailbox_output_surface.h"
 #include "content/renderer/gpu/queue_message_swap_promise.h"
 #include "content/renderer/gpu/render_widget_compositor.h"
 #include "content/renderer/ime_event_guard.h"
 #include "content/renderer/input/input_handler_manager.h"
 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
 #include "content/renderer/render_frame_impl.h"
 #include "content/renderer/render_frame_proxy.h"
 #include "content/renderer/render_process.h"
 #include "content/renderer/render_thread_impl.h"
+#include "content/renderer/render_view_impl.h"
 #include "content/renderer/renderer_blink_platform_impl.h"
 #include "content/renderer/resizing_mode_selector.h"
 #include "ipc/ipc_sync_message.h"
 #include "skia/ext/platform_canvas.h"
 #include "third_party/WebKit/public/platform/WebCursorInfo.h"
 #include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
 #include "third_party/WebKit/public/platform/WebPoint.h"
 #include "third_party/WebKit/public/platform/WebRect.h"
 #include "third_party/WebKit/public/platform/WebScreenInfo.h"
 #include "third_party/WebKit/public/platform/WebSize.h"
@@ skipping 501 matching lines @@
 }
 
 // static
 RenderWidget* RenderWidget::CreateForFrame(
     int routing_id,
     bool hidden,
     const blink::WebScreenInfo& screen_info,
     CompositorDependencies* compositor_deps,
     blink::WebLocalFrame* frame) {
   CHECK_NE(routing_id, MSG_ROUTING_NONE);
+  // TODO(avi): Before RenderViewImpl has-a RenderWidget, the browser passes the
+  // same routing ID for both the view routing ID and the main frame widget
+  // routing ID. https://crbug.com/545684
+  RenderViewImpl* view = RenderViewImpl::FromRoutingID(routing_id);
+  if (view) {
+    view->AttachWebFrameWidget(RenderWidget::CreateWebFrameWidget(view, frame));
+    return view;
+  }
   scoped_refptr<RenderWidget> widget(
       new RenderWidget(compositor_deps, blink::WebPopupTypeNone, screen_info,
                        false, hidden, false));
   widget->routing_id_ = routing_id;
   widget->for_oopif_ = true;
   // DoInit increments the reference count on |widget|, keeping it alive after
   // this function returns.
   if (widget->DoInit(MSG_ROUTING_NONE,
                      RenderWidget::CreateWebFrameWidget(widget.get(), frame),
                      nullptr)) {
     return widget.get();
   }
   return nullptr;
 }
 
 // static
 blink::WebWidget* RenderWidget::CreateWebFrameWidget(
     RenderWidget* render_widget,
     blink::WebLocalFrame* frame) {
+  if (!frame->parent()) {
+    // TODO(dcheng): The main frame widget currently has a special case.
+    // Eliminate this once WebView is no longer a WebWidget.
+    return blink::WebFrameWidget::create(render_widget, frame->view(), frame);
+  }
   return blink::WebFrameWidget::create(render_widget, frame);
 }
 
 // static
 blink::WebWidget* RenderWidget::CreateWebWidget(RenderWidget* render_widget) {
   switch (render_widget->popup_type_) {
     case blink::WebPopupTypeNone:  // Nothing to create.
       break;
     case blink::WebPopupTypePage:
       return WebPagePopup::create(render_widget);
@@ skipping 1794 matching lines @@
 void RenderWidget::RegisterVideoHoleFrame(RenderFrameImpl* frame) {
   video_hole_frames_.AddObserver(frame);
 }
 
 void RenderWidget::UnregisterVideoHoleFrame(RenderFrameImpl* frame) {
   video_hole_frames_.RemoveObserver(frame);
 }
 #endif  // defined(VIDEO_HOLE)
 
 }  // namespace content