Move SetCanHaveScrollbars method from WebFrame to WebLocalFrame.

content/renderer/render_view_impl.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_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <memory>
 
@@ skipping 2171 matching lines @@
                                        top_controls_height_,
                                        browser_controls_shrink_blink_size_);
 }
 
 void RenderViewImpl::OnResize(const ResizeParams& params) {
   TRACE_EVENT0("renderer", "RenderViewImpl::OnResize");
   if (webview()) {
     webview()->HidePopups();
     if (send_preferred_size_changes_ &&
         webview()->MainFrame()->IsWebLocalFrame()) {
-      webview()->MainFrame()->SetCanHaveScrollbars(ShouldDisplayScrollbars(
-          params.new_size.width(), params.new_size.height()));
+      webview()->MainFrame()->ToWebLocalFrame()->SetCanHaveScrollbars(

[dcheng, 2017/06/02 16:29:37]

The downcast is a bit unfortunate but I don't have a better suggestion here =)

+          ShouldDisplayScrollbars(params.new_size.width(),
+                                  params.new_size.height()));
     }
     if (display_mode_ != params.display_mode) {
       display_mode_ = params.display_mode;
       webview()->SetDisplayMode(display_mode_);
     }
   }
 
   gfx::Size old_visible_viewport_size = visible_viewport_size_;
 
   browser_controls_shrink_blink_size_ =
@@ skipping 458 matching lines @@
                         input_event.GetCoalescedEventsPointers(), latency_info,
                         dispatch_type);
     return INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
   }
   idle_user_detector_->ActivityDetected();
   return RenderWidget::HandleInputEvent(input_event, latency_info,
                                         dispatch_type);
 }
 
 }  // namespace content