Tweaks workspace animation code per latest from Nicholas. Additionally

ash/wm/workspace/workspace_animations.h

Index: ash/wm/workspace/workspace_animations.h
diff --git a/ash/wm/workspace/workspace_animations.h b/ash/wm/workspace/workspace_animations.h
new file mode 100644
index 0000000000000000000000000000000000000000..3e60c1b7a742d785f510375e000a17d41176226c
--- /dev/null
+++ b/ash/wm/workspace/workspace_animations.h
@@ -0,0 +1,62 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef ASH_WM_WORKSPACE_WORKSPACE_ANIMATIONS_H_
+#define ASH_WM_WORKSPACE_WORKSPACE_ANIMATIONS_H_
+
+#include "ash/ash_export.h"
+#include "base/time.h"
+
+namespace aura {
+class Window;
+}
+
+// Collection of functions and types needed for animating workspaces.
+
+namespace ash {
+namespace internal {
+
+// Indicates the direction the workspace should appear to go.
+enum WorkspaceAnimationDirection {
+  WORKSPACE_ANIMATE_UP,
+  WORKSPACE_ANIMATE_DOWN,
+};
+
+// The details of this dictate how the show/hide should be animated.
+struct WorkspaceAnimationDetails {
+  WorkspaceAnimationDetails();
+  ~WorkspaceAnimationDetails();
+
+  // Direction to animate.
+  WorkspaceAnimationDirection direction;
+
+  // Whether to animate. If false the show/hide is immediate, otherwise it
+  // animates.
+  bool animate;
+
+  // Whether the opacity should be animated.
+  bool animate_opacity;
+
+  // Whether the scale should be animated.
+  bool animate_scale;
+
+  // The duration of the animation. If empty the default is used.
+  base::TimeDelta duration;
+
+  // Amount of time (in milliseconds) to pause before animating.
+  int pause_time_ms;
+};
+
+// Amount of time for the workspace switch animation.
+extern const int kWorkspaceSwitchTimeMS;
+
+// Shows or hides the workspace animating based on |details|.
+ASH_EXPORT void ShowWorkspace(aura::Window* window,
+                              const WorkspaceAnimationDetails& details);
+ASH_EXPORT void HideWorkspace(aura::Window* window,
+                              const WorkspaceAnimationDetails& details);
+}  // namespace internal
+}  // namespace ash
+
+#endif  // ASH_WM_WORKSPACE_WORKSPACE_ANIMATIONS_H_