Rename MaximizeMode to TabletMode

ash/shell_port.h

Index: ash/shell_port.h
diff --git a/ash/shell_port.h b/ash/shell_port.h
index 9593ef6b965691161e613bb68607a074b548833d..8f56b7f5003d7dcea651fdac7663b700967d6d4f 100644
--- a/ash/shell_port.h
+++ b/ash/shell_port.h
@@ -61,7 +61,7 @@ enum class LoginStatus;
 enum class TaskSwitchSource;
 
 namespace wm {
-class MaximizeModeEventHandler;
+class TabletModeEventHandler;
 class WindowState;
 }
 
@@ -167,8 +167,8 @@ class ASH_EXPORT ShellPort {
   virtual std::unique_ptr<WindowCycleEventFilter>
   CreateWindowCycleEventFilter() = 0;
 
-  virtual std::unique_ptr<wm::MaximizeModeEventHandler>
-  CreateMaximizeModeEventHandler() = 0;
+  virtual std::unique_ptr<wm::TabletModeEventHandler>
+  CreateTabletModeEventHandler() = 0;
 
   virtual std::unique_ptr<WorkspaceEventHandler> CreateWorkspaceEventHandler(
       WmWindow* workspace_window) = 0;