Added an ActivationReason parameter to ActivationChangeObserver::OnWindowActivated(...).

chrome/browser/ui/views/extensions/extension_popup_aura.cc

 // Copyright 2015 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 "chrome/browser/ui/views/extensions/extension_popup_aura.h"
 
 #include "ui/aura/window.h"
 #include "ui/views/widget/widget.h"
 #include "ui/wm/core/window_animations.h"
 #include "ui/wm/core/window_util.h"
@@ skipping 35 matching lines @@
     auto activation_client = aura::client::GetActivationClient(
         widget->GetNativeWindow()->GetRootWindow());
     // If the popup was being inspected with devtools and the browser window
     // was closed, then the root window and activation client are already
     // destroyed.
     if (activation_client)
       activation_client->RemoveObserver(this);
   }
 }
 
-void ExtensionPopupAura::OnWindowActivated(aura::Window* gained_active,
-                                           aura::Window* lost_active) {
+void ExtensionPopupAura::OnWindowActivated(
+    aura::client::ActivationChangeObserver::ActivationReason reason,
+    aura::Window* gained_active,
+    aura::Window* lost_active) {
   // Close on anchor window activation (ie. user clicked the browser window).
   // DesktopNativeWidgetAura does not trigger the expected browser widget
   // [de]activation events when activating widgets in its own root window.
   // This additional check handles those cases. See: http://crbug.com/320889
   if (gained_active == anchor_widget()->GetNativeWindow())
     OnAnchorWindowActivation();
 }