Adding a gray semi transparent backdrop behind the topmost window within the default container

This is part of the "always maximized" feature. Windows which cannot be maximized - or cannot be made to cover the entire screen should have a backdrop behind them which covers the desktop.

Tried various ways to implement this and this seems to be the best solution.

BUG=337567, 337563

Review URL: https://codereview.chromium.org/169643005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255863 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 6 insertions, 0 deletions

diff --git a/ash/wm/workspace_controller.h b/ash/wm/workspace_controller.h
index 84df41c..175ebe7 100644
--- a/ash/wm/workspace_controller.h
+++ b/ash/wm/workspace_controller.h
@@ -21,6 +21,7 @@ class ShelfLayoutManager;
 class WorkspaceControllerTestHelper;
 class WorkspaceEventHandler;
 class WorkspaceLayoutManager;
+class WorkspaceLayoutManagerDelegate;
 
 // WorkspaceController acts as a central place that ties together all the
 // various workspace pieces.
@@ -37,6 +38,11 @@ class ASH_EXPORT WorkspaceController {
   // Starts the animation that occurs on first login.
   void DoInitialAnimation();
 
+  // Add a delegate which adds a backdrop behind the top window of the default
+  // workspace.
+  void SetMaximizeBackdropDelegate(
+      scoped_ptr<WorkspaceLayoutManagerDelegate> delegate);
+
  private:
   friend class WorkspaceControllerTestHelper;