Support app window draggable areas in mash.

components/mus/public/interfaces/window_manager.mojom

Index: components/mus/public/interfaces/window_manager.mojom
diff --git a/components/mus/public/interfaces/window_manager.mojom b/components/mus/public/interfaces/window_manager.mojom
index 0b31c9541854cd37323469e87da9abd11a674488..02341001175bd10950cab3219c5fef41632083d6 100644
--- a/components/mus/public/interfaces/window_manager.mojom
+++ b/components/mus/public/interfaces/window_manager.mojom
@@ -50,6 +50,8 @@ interface WindowManager {
   const string kWindowIgnoredByShelf_Property = "prop:window-ignored-by-shelf";
   // The application ID (eg. 'mojo:foo'). Type: mojom::String
   const string kAppID_Property = "prop:app-id";
+  // A flag controlling the presence of standard frame components. Type: bool

[James Cook, 2016/06/14 23:44:56]

I would duplicate the comment from ui/views/widget.h initparams.

[msw, 2016/06/15 17:06:41]

Done.

+  const string kRemoveStandardFrame_Property = "prop:remove-standard-frame";
 
   // When the WindowManager completes a request it must call back to
   // WindowManagerClient::WmResponse().