Propagate auto-resize viewport values to OOPIF processes

content/browser/frame_host/render_widget_host_view_child_frame.cc

 // Copyright 2014 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/browser/frame_host/render_widget_host_view_child_frame.h"
 
 #include <algorithm>
 #include <utility>
 #include <vector>
 
@@ skipping 214 matching lines @@
   // this bubbles up to the parent until it hits the main frame's
   // RenderWidgetHostView.
   //
   // Currently this excludes webview guests, since they expect the visual
   // viewport to return the guest's size rather than the page's; one reason why
   // is that Blink ends up using the visual viewport to calculate things like
   // window.innerWidth/innerHeight for main frames, and a guest is considered
   // to be a main frame.  This should be cleaned up eventually.
   bool is_guest = BrowserPluginGuest::IsGuest(RenderViewHostImpl::From(host_));
   if (frame_connector_ && !is_guest) {
+    // An auto-resize set by the top-level frame overrides what would be
+    // reported by embedding RenderWidgetHostViews.
+    if (host_->delegate() && !host_->delegate()->GetAutoResizeSize().IsEmpty())
+      return host_->delegate()->GetAutoResizeSize();
+
     RenderWidgetHostView* parent_view =
         frame_connector_->GetParentRenderWidgetHostView();
     // The parent_view can be null in unit tests when using a TestWebContents.
     if (parent_view)
       return parent_view->GetVisibleViewportSize();
   }
   return GetViewBounds().size();
 }
 
 gfx::Vector2dF RenderWidgetHostViewChildFrame::GetLastScrollOffset() const {
@@ skipping 577 matching lines @@
     auto origin = GetViewBounds().origin() -
                   frame_connector_->GetRootRenderWidgetHostView()
                       ->GetViewBounds()
                       .origin();
     return gfx::Point(origin.x(), origin.y());
   }
   return gfx::Point();
 }
 
 }  // namespace content