Explicitly coerce PostDispatchAction to uint32_t in DispatchEvent()

ui/wm/core/nested_accelerator_controller_unittest.cc

 // 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/wm/core/nested_accelerator_controller.h"
 
 #include "base/bind.h"
 #include "base/event_types.h"
 #include "base/message_loop/message_loop.h"
 #include "ui/aura/test/aura_test_base.h"
@@ skipping 28 matching lines @@
   int num_key_events_dispatched() { return num_key_events_dispatched_; }
 
  private:
   // ui::PlatformEventDispatcher:
   virtual bool CanDispatchEvent(const ui::PlatformEvent& event) override {
     return true;
   }
   virtual uint32_t DispatchEvent(const ui::PlatformEvent& event) override {
     if (ui::EventTypeFromNative(event) == ui::ET_KEY_RELEASED)
       num_key_events_dispatched_++;
-    return ui::POST_DISPATCH_NONE;
+    return ui::kPostDispatchNone;
   }
 
   int num_key_events_dispatched_;
 
   DISALLOW_COPY_AND_ASSIGN(MockDispatcher);
 };
 
 class TestTarget : public ui::AcceleratorTarget {
  public:
   TestTarget() : accelerator_pressed_count_(0) {}
@@ skipping 138 matching lines @@
           &inner_dispatcher);
   aura::client::DispatcherRunLoop run_loop(
       aura::client::GetDispatcherClient(root_window()), NULL);
   run_loop.Run();
   EXPECT_EQ(0, inner_dispatcher.num_key_events_dispatched());
   EXPECT_EQ(1, target.accelerator_pressed_count());
 }
 
 }  //  namespace test
 }  //  namespace wm