mus: Server-side implementation of modal windows

components/mus/ws/server_window.h

Index: components/mus/ws/server_window.h
diff --git a/components/mus/ws/server_window.h b/components/mus/ws/server_window.h
index 46a1b21b81a798ccc661821f08527a3adf336c5b..0c15490eab7a42e09a4b1bab38db52269104a005 100644
--- a/components/mus/ws/server_window.h
+++ b/components/mus/ws/server_window.h
@@ -108,6 +108,16 @@ class ServerWindow {
 
   const Windows& transient_children() const { return transient_children_; }
 
+  bool is_modal() const { return is_modal_; }
+  void SetAsModal();

[sky, 2016/03/09 16:33:56]

SetModal.

[mohsen, 2016/03/09 18:32:51]

Done. Also changed AccessPolicy::CanSetAsModal to CanSetModal.

+
+  bool IsBlockedByModalWindow() const;
+  const ServerWindow* GetModalTarget() const;

[sky, 2016/03/09 16:33:56]

Add description of GetModalTarget.

[mohsen, 2016/03/09 18:32:51]

Done.

+  ServerWindow* GetModalTarget() {
+    return const_cast<ServerWindow*>(
+        static_cast<const ServerWindow*>(this)->GetModalTarget());
+  }
+
   // Returns true if this contains |window| or is |window|.
   bool Contains(const ServerWindow* window) const;
 
@@ -197,6 +207,7 @@ class ServerWindow {
   ServerWindow* transient_parent_;
   Windows transient_children_;
 
+  bool is_modal_;
   bool visible_;
   gfx::Rect bounds_;
   gfx::Insets client_area_;