exo: Add initial support for service side decorations.

components/exo/shell_surface.h

Index: components/exo/shell_surface.h
diff --git a/components/exo/shell_surface.h b/components/exo/shell_surface.h
index 68d4bc280ae660394b5ce165da8d0542e1c3561a..beca1bafb9b8c7db3fb40ba3911646dd3b80be31 100644
--- a/components/exo/shell_surface.h
+++ b/components/exo/shell_surface.h
@@ -51,6 +51,7 @@ class ShellSurface : public SurfaceDelegate,
                ShellSurface* parent,
                const gfx::Rect& initial_bounds,
                bool activatable,
+               bool can_minimize,
                int container);
   explicit ShellSurface(Surface* surface);
   ~ShellSurface() override;
@@ -146,13 +147,19 @@ class ShellSurface : public SurfaceDelegate,
   // for the surface from the user's perspective.
   void SetGeometry(const gfx::Rect& geometry);
 
-  // Set the content bounds for the shadow. Empty bounds will delete
-  // the shadow.
-  void SetRectangularShadow(const gfx::Rect& content_bounds);
+  // Enable/disable rectangular shadow.
+  void SetRectangularShadow(bool enabled);
+
+  // Set the content bounds for the shadow. Shell surface geometry will be
+  // used if bounds are empty.
+  void SetRectangularShadowContentBounds(const gfx::Rect& content_bounds);
 
   // Set the pacity of the background for the window that has a shadow.
   void SetRectangularShadowBackgroundOpacity(float opacity);
 
+  // Enable/disable window frame.
+  void SetFrame(bool enabled);
+
   // Set scale factor for surface. The scale factor will be applied to surface
   // and all descendants.
   void SetScale(double scale);
@@ -163,8 +170,8 @@ class ShellSurface : public SurfaceDelegate,
   // Set origin in screen coordinate space.
   void SetOrigin(const gfx::Point& origin);
 
-  // Set activatable state for surface.
-  void SetActivatable(bool activatable);
+  // Set container for surface.
+  void SetContainer(int container);
 
   // Sets the main surface for the window.
   static void SetMainSurface(aura::Window* window, Surface* surface);
@@ -199,6 +206,7 @@ class ShellSurface : public SurfaceDelegate,
 
   // Overridden from views::View:
   gfx::Size GetPreferredSize() const override;
+  gfx::Size GetMinimumSize() const override;
 
   // Overridden from ash::wm::WindowStateObserver:
   void OnPreWindowStateTypeChange(ash::wm::WindowState* window_state,
@@ -276,8 +284,11 @@ class ShellSurface : public SurfaceDelegate,
   aura::Window* parent_;
   gfx::Rect initial_bounds_;
   bool activatable_ = true;
+  const bool can_minimize_;
   // Container Window Id (see ash/public/cpp/shell_window_ids.h)
-  const int container_;
+  int container_;
+  bool frame_enabled_ = false;
+  bool shadow_enabled_ = false;
   bool pending_show_widget_ = false;
   base::string16 title_;
   std::string application_id_;
@@ -300,12 +311,12 @@ class ShellSurface : public SurfaceDelegate,
   aura::Window* shadow_underlay_ = nullptr;
   std::unique_ptr<ui::EventHandler> shadow_underlay_event_handler_;
   gfx::Rect shadow_content_bounds_;
+  float shadow_background_opacity_ = 1.0;
   std::deque<Config> pending_configs_;
   std::unique_ptr<ash::WindowResizer> resizer_;
   std::unique_ptr<ScopedAnimationsDisabled> scoped_animations_disabled_;
   int top_inset_height_ = 0;
   int pending_top_inset_height_ = 0;
-  float rectangular_shadow_background_opacity_ = 1.0;
 
   DISALLOW_COPY_AND_ASSIGN(ShellSurface);
 };