Support NSFlagsChanged in ui::EventFromNative.

ui/events/cocoa/events_mac.mm

 // 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 "ui/events/event_utils.h"
 
 #include <Cocoa/Cocoa.h>
 #include <stdint.h>
 
 #include "base/logging.h"
 #import "base/mac/mac_util.h"
 #import "base/mac/sdk_forward_declarations.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "ui/events/base_event_utils.h"
 #include "ui/events/cocoa/cocoa_event_utils.h"
 #include "ui/events/event_utils.h"
 #import "ui/events/keycodes/keyboard_code_conversion_mac.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/geometry/vector2d.h"
 
 namespace ui {
 
 EventType EventTypeFromNative(const base::NativeEvent& native_event) {
   NSEventType type = [native_event type];
   switch (type) {
     case NSKeyDown:
-      return ET_KEY_PRESSED;
     case NSKeyUp:
-      return ET_KEY_RELEASED;
+    case NSFlagsChanged:
+      return IsKeyUpEvent(native_event) ? ET_KEY_RELEASED : ET_KEY_PRESSED;
     case NSLeftMouseDown:
     case NSRightMouseDown:
     case NSOtherMouseDown:
       return ET_MOUSE_PRESSED;
     case NSLeftMouseUp:
     case NSRightMouseUp:
     case NSOtherMouseUp:
       return ET_MOUSE_RELEASED;
     case NSLeftMouseDragged:
     case NSRightMouseDragged:
     case NSOtherMouseDragged:
       return ET_MOUSE_DRAGGED;
     case NSMouseMoved:
       return ET_MOUSE_MOVED;
     case NSScrollWheel:
       return ET_SCROLL;
     case NSMouseEntered:
       return ET_MOUSE_ENTERED;
     case NSMouseExited:
       return ET_MOUSE_EXITED;
     case NSEventTypeSwipe:
       return ET_SCROLL_FLING_START;
     case NSAppKitDefined:
     case NSSystemDefined:
       return ET_UNKNOWN;
-    case NSFlagsChanged:
     case NSApplicationDefined:
     case NSPeriodic:
     case NSCursorUpdate:
     case NSTabletPoint:
     case NSTabletProximity:
     case NSEventTypeGesture:
     case NSEventTypeMagnify:
     case NSEventTypeRotate:
     case NSEventTypeBeginGesture:
     case NSEventTypeEndGesture:
@@ skipping 233 matching lines @@
   uint16_t return_value;
   [text getCharacters:&return_value];
   return return_value;
 }
 
 bool IsCharFromNative(const base::NativeEvent& native_event) {
   return false;
 }
 
 }  // namespace ui