context menu does not work if one already open

ui/base/events/event.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/base/events/event.h"
 
 #if defined(USE_X11)
 #include <X11/Xlib.h>
 #endif
 
@@ skipping 86 matching lines @@
     CASE_TYPE(ET_SCROLL_FLING_CANCEL);
     case ui::ET_LAST: NOTREACHED(); return std::string();
     // Don't include default, so that we get an error when new type is added.
   }
 #undef CASE_TYPE
 
   NOTREACHED();
   return std::string();
 }
 
+bool IsX11SendEventTrue(const base::NativeEvent& event) {
+#if defined(USE_X11)
+  if (event && event->xany.send_event)
+    return true;
+#endif
+  return false;
+}
+
 }  // namespace
 
 namespace ui {
 
 ////////////////////////////////////////////////////////////////////////////////
 // Event
 
 Event::~Event() {
 #if defined(USE_X11)
   if (delete_native_event_)
@@ skipping 193 matching lines @@
   if (abs(event2.y() - event1.y()) > kDoubleClickHeight / 2)
     return false;
 
   return true;
 }
 
 // static
 int MouseEvent::GetRepeatCount(const MouseEvent& event) {
   int click_count = 1;
   if (last_click_event_) {
-    if (IsRepeatedClickEvent(*last_click_event_, event))
+    if (IsX11SendEventTrue(event.native_event()))
+      click_count = last_click_event_->GetClickCount();
+    else if (IsRepeatedClickEvent(*last_click_event_, event))
       click_count = last_click_event_->GetClickCount() + 1;
     delete last_click_event_;
   }
   last_click_event_ = new MouseEvent(event);
   if (click_count > 3)
     click_count = 3;
   last_click_event_->SetClickCount(click_count);
   return click_count;
 }
 
@@ skipping 334 matching lines @@
 int GestureEvent::GetLowestTouchId() const {
   if (touch_ids_bitfield_ == 0)
     return -1;
   int i = -1;
   // Find the index of the least significant 1 bit
   while (!(1 << ++i & touch_ids_bitfield_));
   return i;
 }
 
 }  // namespace ui