exo: Improved implementation of child surfaces and popups.

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 38f049a09be9df2ed9ca9692fcc7f08df69e7562..8d32e9fdd71a6f635afd9b17547101f18e51e9b1 100644
--- a/components/exo/shell_surface.h
+++ b/components/exo/shell_surface.h
@@ -39,7 +39,8 @@ class ShellSurface : public SurfaceDelegate,
  public:
   ShellSurface(Surface* surface,
                ShellSurface* parent,
-               const gfx::Rect& initial_bounds);
+               const gfx::Rect& initial_bounds,
+               bool activatable);
   explicit ShellSurface(Surface* surface);
   ~ShellSurface() override;
 
@@ -119,6 +120,7 @@ class ShellSurface : public SurfaceDelegate,
 
   // Overridden from views::WidgetDelegate:
   base::string16 GetWindowTitle() const override;
+  void WindowClosing() override;
   views::Widget* GetWidget() override;
   const views::Widget* GetWidget() const override;
   views::View* GetContentsView() override;
@@ -150,10 +152,14 @@ class ShellSurface : public SurfaceDelegate,
   // Asks the client to configure its surface.
   void Configure();
 
-  scoped_ptr<views::Widget> widget_;
+  // Returns the "visible bounds" for the surface from the user's perspective.
+  gfx::Rect GetVisibleBounds() const;
+
+  views::Widget* widget_;
   Surface* surface_;
   aura::Window* parent_;
   const gfx::Rect initial_bounds_;
+  const bool activatable_;
   base::string16 title_;
   std::string application_id_;
   gfx::Rect geometry_;