[Master/Overview CL] Make PageScaleFactor work for oopif subframe.

content/browser/renderer_host/render_widget_host_input_event_router.cc

 // Copyright 2015 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/renderer_host/render_widget_host_input_event_router.h"
 
 #include <vector>
 
 #include "base/metrics/histogram_macros.h"
 
@@ skipping 631 matching lines @@
     // should have been one.
     if (root_view != touchscreen_gesture_target_.target &&
         !rwhi->is_in_touchscreen_gesture_scroll()) {
       gesture_pinch_did_send_scroll_begin_ = true;
       SendGestureScrollBegin(root_view, *event);
     }
   }
 
   if (in_touchscreen_gesture_pinch_) {
     root_view->ProcessGestureEvent(*event, latency);
+    if (event->type == blink::WebInputEvent::GesturePinchUpdate)
+      root_view->UpdatePageScaleFactor(event->data.pinchUpdate.scale);
     if (event->type == blink::WebInputEvent::GesturePinchEnd) {
       in_touchscreen_gesture_pinch_ = false;
       // If the root view wasn't already receiving the gesture stream, then we
       // need to wrap the diverted pinch events in a GestureScrollBegin/End.
       auto rwhi =
           static_cast<RenderWidgetHostImpl*>(root_view->GetRenderWidgetHost());
       if (root_view != touchscreen_gesture_target_.target &&
           gesture_pinch_did_send_scroll_begin_ &&
           rwhi->is_in_touchscreen_gesture_scroll()) {
         SendGestureScrollEnd(root_view, *event);
@@ skipping 77 matching lines @@
   if (!touchpad_gesture_target_.target)
     return;
 
   // TODO(mohsen): Add tests to check event location.
   event->x += touchpad_gesture_target_.delta.x();
   event->y += touchpad_gesture_target_.delta.y();
   touchpad_gesture_target_.target->ProcessGestureEvent(*event, latency);
 }
 
 }  // namespace content