Do not release capture when transferring capture between Chrome windows on Linux

ui/events/x/events_x.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 "ui/events/event_constants.h"
 
 #include <cmath>
 #include <string.h>
 #include <X11/extensions/XInput.h>
 #include <X11/extensions/XInput2.h>
@@ skipping 518 matching lines @@
 int EventButtonFromNative(const base::NativeEvent& native_event) {
   CHECK_EQ(GenericEvent, native_event->type);
   XIDeviceEvent* xievent =
       static_cast<XIDeviceEvent*>(native_event->xcookie.data);
   int button = xievent->detail;
 
   return (xievent->sourceid == xievent->deviceid) ?
          DeviceDataManagerX11::GetInstance()->GetMappedButton(button) : button;
 }
 
+gfx::AcceleratedWidget EventTargetFromNative(
+    const base::NativeEvent& native_event) {
+  return (native_event->type == GenericEvent) ?
+      static_cast<XIDeviceEvent*>(native_event->xcookie.data)->event :
+      native_event->xany.window;
+}
+
 KeyboardCode KeyboardCodeFromNative(const base::NativeEvent& native_event) {
   return KeyboardCodeFromXKeyEvent(native_event);
 }
 
 const char* CodeFromNative(const base::NativeEvent& native_event) {
   return CodeFromXEvent(native_event);
 }
 
 uint32 PlatformKeycodeFromNative(const base::NativeEvent& native_event) {
   KeySym keysym;
@@ skipping 192 matching lines @@
   DeviceDataManagerX11::GetInstance()->GetGestureTimes(
       native_event, start_time, end_time);
   return true;
 }
 
 bool IsTouchpadEvent(const base::NativeEvent& event) {
   return DeviceDataManagerX11::GetInstance()->IsTouchpadXInputEvent(event);
 }
 
 }  // namespace ui