touch: Fix a crash when touching a date-picker.

content/browser/renderer_host/render_widget_host_view_aura.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/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 1131 matching lines @@
 ui::GestureStatus RenderWidgetHostViewAura::OnGestureEvent(
     aura::GestureEvent* event) {
   TRACE_EVENT0("browser", "RenderWidgetHostViewAura::OnGestureEvent");
   // Pinch gestures are currently disabled by default. See crbug.com/128477.
   if ((event->type() == ui::ET_GESTURE_PINCH_BEGIN ||
       event->type() == ui::ET_GESTURE_PINCH_UPDATE ||
       event->type() == ui::ET_GESTURE_PINCH_END) && !ShouldSendPinchGesture()) {
     return ui::GESTURE_STATUS_CONSUMED;
   }
 
-  RenderViewHostDelegate* delegate = RenderViewHost::From(host_)->GetDelegate();
-  if (event->type() == ui::ET_GESTURE_BEGIN &&
+  RenderViewHostDelegate* delegate = NULL;
+  if (popup_type_ == WebKit::WebPopupTypeNone)
+    delegate = RenderViewHost::From(host_)->GetDelegate();
+  if (delegate && event->type() == ui::ET_GESTURE_BEGIN &&
       event->details().touch_points() == 1) {
     delegate->HandleGestureBegin();
   }
 
   WebKit::WebGestureEvent gesture = MakeWebGestureEvent(event);
   if (event->type() == ui::ET_GESTURE_TAP_DOWN) {
     // Webkit does not stop a fling-scroll on tap-down. So explicitly send an
     // event to stop any in-progress flings.
     WebKit::WebGestureEvent fling_cancel = gesture;
     fling_cancel.type = WebKit::WebInputEvent::GestureFlingCancel;
     host_->ForwardGestureEvent(fling_cancel);
   }
 
   if (gesture.type != WebKit::WebInputEvent::Undefined) {
     host_->ForwardGestureEvent(gesture);
 
     if (event->type() == ui::ET_GESTURE_SCROLL_BEGIN ||
         event->type() == ui::ET_GESTURE_SCROLL_UPDATE ||
         event->type() == ui::ET_GESTURE_SCROLL_END) {
       RecordAction(UserMetricsAction("TouchscreenScroll"));
     } else if (event->type() == ui::ET_SCROLL_FLING_START) {
       RecordAction(UserMetricsAction("TouchscreenScrollFling"));
     }
   }
 
-  if (event->type() == ui::ET_GESTURE_END &&
+  if (delegate && event->type() == ui::ET_GESTURE_END &&
       event->details().touch_points() == 1) {
     delegate->HandleGestureEnd();
   }
 
   // If a gesture is not processed by the webpage, then WebKit processes it
   // (e.g. generates synthetic mouse events). So CONSUMED should be returned
   // from here to avoid any duplicate synthetic mouse-events being generated
   // from aura.
   return ui::GESTURE_STATUS_CONSUMED;
 }
@@ skipping 302 matching lines @@
     RenderWidgetHost* widget) {
   return new RenderWidgetHostViewAura(widget);
 }
 
 // static
 void RenderWidgetHostViewPort::GetDefaultScreenInfo(WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }
 
 }  // namespace content