Stick windows to sides of workspaces

ash/wm/panels/panel_window_resizer.h

Index: ash/wm/panels/panel_window_resizer.h
diff --git a/ash/wm/panels/panel_window_resizer.h b/ash/wm/panels/panel_window_resizer.h
index 5dbc32d0aea2bd612dbc76b114b23a5e4d368323..eee15b4bc48c03cf3ca6c935f3505f216ffc271c 100644
--- a/ash/wm/panels/panel_window_resizer.h
+++ b/ash/wm/panels/panel_window_resizer.h
@@ -13,6 +13,10 @@ class Rect;
 class Point;
 }
 
+namespace aura {
+class RootWindow;
+}
+
 namespace ash {
 
 // PanelWindowResizer is used by ToplevelWindowEventFilter to handle dragging,
@@ -30,7 +34,7 @@ class ASH_EXPORT PanelWindowResizer : public WindowResizer {
                                     const gfx::Point& location,
                                     int window_component);
 
-  // WindowResizer overides:
+  // WindowResizer:
   virtual void Drag(const gfx::Point& location, int event_flags) OVERRIDE;
   virtual void CompleteDrag(int event_flags) OVERRIDE;
   virtual void RevertDrag() OVERRIDE;
@@ -65,6 +69,8 @@ class ASH_EXPORT PanelWindowResizer : public WindowResizer {
 
   const Details details_;
 
+  gfx::Point last_mouse_location_;
+
   // Wraps a window resizer and adds panel detaching / reattaching and snapping
   // to launcher behavior during drags.
   scoped_ptr<WindowResizer> next_window_resizer_;
@@ -72,6 +78,9 @@ class ASH_EXPORT PanelWindowResizer : public WindowResizer {
   // Panel container window.
   aura::Window* panel_container_;
 
+  // Cached root window when drag started
+  aura::RootWindow* root_window_;
+
   // Set to true once Drag() is invoked and the bounds of the window change.
   bool did_move_or_resize_;
 
@@ -88,6 +97,6 @@ class ASH_EXPORT PanelWindowResizer : public WindowResizer {
   DISALLOW_COPY_AND_ASSIGN(PanelWindowResizer);
 };
 
-}  // namespace aura
+}  // namespace ash
 
 #endif  // ASH_WM_PANELS_PANEL_WINDOW_RESIZER_H_