Removes the grid from ash.

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 46d6efb4b22cc9bb00e0b43020deb830220e6f7b..dfdd06454785c03cd0ec25734b9ceaa56ec78092 100644
--- a/ash/wm/workspace_controller.h
+++ b/ash/wm/workspace_controller.h
@@ -25,8 +25,7 @@ class WorkspaceEventFilter;
 class WorkspaceLayoutManager;
 
 // WorkspaceController acts as a central place that ties together all the
-// various workspace pieces: WorkspaceManager, WorkspaceLayoutManager and
-// WorkspaceEventFilter.
+// various workspace pieces.
 class ASH_EXPORT WorkspaceController
     : public aura::client::ActivationChangeObserver {
  public:
@@ -39,10 +38,6 @@ class ASH_EXPORT WorkspaceController
   // Returns true if in maximized or fullscreen mode.
   bool IsInMaximizedMode() const;
 
-  // Sets the size of the grid.
-  void SetGridSize(int grid_size);
-  int GetGridSize() const;
-
   // Returns the current window state.
   WorkspaceWindowState GetWindowState() const;