Make sure fast-path scrolls bubble on non-scrollable guest.

content/browser/frame_host/render_widget_host_view_guest.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 "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "cc/surfaces/surface.h"
 #include "cc/surfaces/surface_factory.h"
@@ skipping 614 matching lines @@
 
 RenderWidgetHostViewBase*
 RenderWidgetHostViewGuest::GetOwnerRenderWidgetHostView() const {
   return static_cast<RenderWidgetHostViewBase*>(
       guest_->GetOwnerRenderWidgetHostView());
 }
 
 void RenderWidgetHostViewGuest::WheelEventAck(
     const blink::WebMouseWheelEvent& event,
     InputEventAckState ack_result) {
-  if (ack_result == INPUT_EVENT_ACK_STATE_NOT_CONSUMED)
+  if (ack_result == INPUT_EVENT_ACK_STATE_NOT_CONSUMED ||
+      ack_result == INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS) {
     guest_->ResendEventToEmbedder(event);
+  }
 }
 
 void RenderWidgetHostViewGuest::GestureEventAck(
     const blink::WebGestureEvent& event,
     InputEventAckState ack_result) {
-  bool not_consumed = INPUT_EVENT_ACK_STATE_NOT_CONSUMED == ack_result;
+  bool not_consumed = ack_result == INPUT_EVENT_ACK_STATE_NOT_CONSUMED ||
+                      ack_result == INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS;
   // GestureScrollBegin/End are always consumed by the guest, so we only
   // forward GestureScrollUpdate.
   if (event.type == blink::WebInputEvent::GestureScrollUpdate && not_consumed)
     guest_->ResendEventToEmbedder(event);
 }
 
 void RenderWidgetHostViewGuest::OnHandleInputEvent(
     RenderWidgetHostImpl* embedder,
     int browser_plugin_instance_id,
     const gfx::Rect& guest_window_rect,
@@ skipping 61 matching lines @@
     if (gesture_event.type == blink::WebInputEvent::GestureScrollUpdate &&
         gesture_event.data.scrollUpdate.inertial) {
       return;
     }
     host_->ForwardGestureEvent(gesture_event);
     return;
   }
 }
 
 }  // namespace content