exo: Fix dragging edge cases

components/exo/keyboard.cc

Index: components/exo/keyboard.cc
diff --git a/components/exo/keyboard.cc b/components/exo/keyboard.cc
index c651a5672bacc8a045a3c903b7f69f1dfad43077..8d2f355b72ee277f11ae1441b24fbad2e5d92ae7 100644
--- a/components/exo/keyboard.cc
+++ b/components/exo/keyboard.cc
@@ -96,7 +96,7 @@ Keyboard::Keyboard(KeyboardDelegate* delegate) : delegate_(delegate) {
   auto* helper = WMHelper::GetInstance();
   helper->AddPostTargetHandler(this);
   helper->AddFocusObserver(this);
-  helper->AddMaximizeModeObserver(this);
+  helper->AddShellObserver(this);
   helper->AddInputDeviceEventObserver(this);
   OnWindowFocused(helper->GetFocusedWindow(), nullptr);
 }
@@ -110,7 +110,7 @@ Keyboard::~Keyboard() {
   auto* helper = WMHelper::GetInstance();
   helper->RemoveFocusObserver(this);
   helper->RemovePostTargetHandler(this);
-  helper->RemoveMaximizeModeObserver(this);
+  helper->RemoveShellObserver(this);
   helper->RemoveInputDeviceEventObserver(this);
 }
 
@@ -215,7 +215,7 @@ void Keyboard::OnKeyboardDeviceConfigurationChanged() {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-// WMHelper::MaximizeModeObserver overrides:
+// WMHelper::ShellObserver overrides:
 
 void Keyboard::OnMaximizeModeStarted() {
   OnKeyboardDeviceConfigurationChanged();