exo: Fix dragging edge cases

components/exo/wm_helper.cc

 // Copyright 2016 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 "components/exo/wm_helper.h"
 
 #include "base/memory/ptr_util.h"
 
 namespace exo {
 namespace {
@@ skipping 36 matching lines @@
 }
 
 void WMHelper::AddCursorObserver(CursorObserver* observer) {
   cursor_observers_.AddObserver(observer);
 }
 
 void WMHelper::RemoveCursorObserver(CursorObserver* observer) {
   cursor_observers_.RemoveObserver(observer);
 }
 
-void WMHelper::AddMaximizeModeObserver(MaximizeModeObserver* observer) {
-  maximize_mode_observers_.AddObserver(observer);
+void WMHelper::AddShellObserver(ShellObserver* observer) {
+  shell_observers_.AddObserver(observer);
 }
 
-void WMHelper::RemoveMaximizeModeObserver(MaximizeModeObserver* observer) {
-  maximize_mode_observers_.RemoveObserver(observer);
+void WMHelper::RemoveShellObserver(ShellObserver* observer) {
+  shell_observers_.RemoveObserver(observer);
 }
 
 void WMHelper::NotifyWindowActivated(aura::Window* gained_active,
                                      aura::Window* lost_active) {
   FOR_EACH_OBSERVER(ActivationObserver, activation_observers_,
                     OnWindowActivated(gained_active, lost_active));
 }
 
 void WMHelper::NotifyWindowFocused(aura::Window* gained_focus,
                                    aura::Window* lost_focus) {
   FOR_EACH_OBSERVER(FocusObserver, focus_observers_,
                     OnWindowFocused(gained_focus, lost_focus));
 }
 
 void WMHelper::NotifyCursorVisibilityChanged(bool is_visible) {
   FOR_EACH_OBSERVER(CursorObserver, cursor_observers_,
                     OnCursorVisibilityChanged(is_visible));
 }
 
 void WMHelper::NotifyCursorSetChanged(ui::CursorSetType cursor_set) {
   FOR_EACH_OBSERVER(CursorObserver, cursor_observers_,
                     OnCursorSetChanged(cursor_set));
 }
 
 void WMHelper::NotifyMaximizeModeStarted() {
-  FOR_EACH_OBSERVER(MaximizeModeObserver, maximize_mode_observers_,
-                    OnMaximizeModeStarted());
+  FOR_EACH_OBSERVER(ShellObserver, shell_observers_, OnMaximizeModeStarted());
 }
 
 void WMHelper::NotifyMaximizeModeEnded() {
-  FOR_EACH_OBSERVER(MaximizeModeObserver, maximize_mode_observers_,
-                    OnMaximizeModeEnded());
+  FOR_EACH_OBSERVER(ShellObserver, shell_observers_, OnMaximizeModeEnded());
+}
+
+void WMHelper::NotifyOverviewModeStarted() {
+  FOR_EACH_OBSERVER(ShellObserver, shell_observers_, OnOverviewModeStarted());
+}
+
+void WMHelper::NotifyOverviewModeEnded() {
+  FOR_EACH_OBSERVER(ShellObserver, shell_observers_, OnOverviewModeEnded());
 }
 
 }  // namespace exo