Merge 284026 "Add app.window.alphaEnabled() and onAlphaEnabledCh..."

apps/app_window.h

Index: apps/app_window.h
===================================================================
--- apps/app_window.h	(revision 285043)
+++ apps/app_window.h	(working copy)
@@ -362,6 +362,11 @@
   // app.
   void WindowEventsReady();
 
+  // Whether the app window wants a transparent background.
+  bool requested_transparent_background() const {
+    return requested_transparent_background_;
+  }
+
  protected:
   virtual ~AppWindow();
 
@@ -558,6 +563,9 @@
   // taskbar.
   bool cached_always_on_top_;
 
+  // Whether |transparent_background| was set in the CreateParams.
+  bool requested_transparent_background_;
+
   DISALLOW_COPY_AND_ASSIGN(AppWindow);
 };