exo: Improve Maximize and Fullscreen support for ShellSurfaces.

components/exo/shell_surface.h

 // 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.
 
 #ifndef COMPONENTS_EXO_SHELL_SURFACE_H_
 #define COMPONENTS_EXO_SHELL_SURFACE_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 28 matching lines @@
   void set_close_callback(const base::Closure& close_callback) {
     close_callback_ = close_callback;
   }
 
   // Set the callback to run when the surface is destroyed.
   void set_surface_destroyed_callback(
       const base::Closure& surface_destroyed_callback) {
     surface_destroyed_callback_ = surface_destroyed_callback;
   }
 
-  // Show surface as a toplevel window.
-  void SetToplevel();
+  // Set the callback to run when the client is asked to resize the surface.
+  // The size is a hint, in the sense that the client is free to ignore it if
+  // it doesn't resize, pick a smaller size (to satisfy aspect ratio or resize
+  // in steps of NxM pixels).
+  using ConfigureCallback = base::Callback<void(const gfx::Size& size)>;
+  void set_configure_callback(const ConfigureCallback& configure_callback) {
+    configure_callback_ = configure_callback;
+  }
 
-  // Maximize or show surface as a maximized window.
-  void SetMaximized();
+  // Initialize shell surface as a toplevel window.
+  void Init();
 
-  // Fullscreen or show surface as a fullscreen window.
-  void SetFullscreen();
+  // Maximizes the shell surface.
+  void Maximize();
+
+  // Set fullscreen state for shell surface.
+  void SetFullscreen(bool fullscreen);
 
   // Set title for surface.
   void SetTitle(const base::string16& title);
 
   // Sets the application ID for the window. The application ID identifies the
   // general class of applications to which the window belongs.
   static void SetApplicationId(aura::Window* window,
                                std::string* application_id);
   static const std::string GetApplicationId(aura::Window* window);
 
@@ skipping 33 matching lines @@
   gfx::Size GetPreferredSize() const override;
 
  private:
   scoped_ptr<views::Widget> widget_;
   Surface* surface_;
   base::string16 title_;
   std::string application_id_;
   gfx::Rect geometry_;
   base::Closure close_callback_;
   base::Closure surface_destroyed_callback_;
+  ConfigureCallback configure_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellSurface);
 };
 
 }  // namespace exo
 
 #endif  // COMPONENTS_EXO_SHELL_SURFACE_H_