ash/immersive mode: Hide the launcher when entering immersive mode

ash/wm/workspace_controller.h

Index: ash/wm/workspace_controller.h
diff --git a/ash/wm/workspace_controller.h b/ash/wm/workspace_controller.h
index a77863af9675ebacbc2e461405e0e27537bdfa28..88c427a0025d36b13ba14609ee53575721b7268e 100644
--- a/ash/wm/workspace_controller.h
+++ b/ash/wm/workspace_controller.h
@@ -23,6 +23,7 @@ class WorkspaceControllerTestHelper;
 class WorkspaceCycler;
 class WorkspaceEventHandler;
 class WorkspaceManager;
+class Workspace;
 
 // WorkspaceController acts as a central place that ties together all the
 // various workspace pieces.
@@ -40,6 +41,9 @@ class ASH_EXPORT WorkspaceController
   // Sets the active workspace based on |window|.
   void SetActiveWorkspaceByWindow(aura::Window* window);
 
+  // Returns the currently active workspace.

[sky, 2013/01/10 19:02:05]

Same comment about not exposing workspace. I'm ok exposing the parent window,
but not Worskpace.

+  Workspace* GetActiveWorkspace() const;
+
   // See description in BaseWorkspaceManager::GetParentForNewWindow().
   aura::Window* GetParentForNewWindow(aura::Window* window);