Stick windows to sides of workspaces

ash/wm/panels/panel_window_resizer.cc

Index: ash/wm/panels/panel_window_resizer.cc
diff --git a/ash/wm/panels/panel_window_resizer.cc b/ash/wm/panels/panel_window_resizer.cc
index 947cf90931b0cbbbd2a814f8f926d56bf4329b47..72dd7bd8d7b3e409892bb2cebfa8f3e6a7496b86 100644
--- a/ash/wm/panels/panel_window_resizer.cc
+++ b/ash/wm/panels/panel_window_resizer.cc
@@ -6,7 +6,6 @@
 
 #include "ash/display/display_controller.h"
 #include "ash/launcher/launcher.h"
-#include "ash/root_window_controller.h"
 #include "ash/screen_ash.h"
 #include "ash/shelf/shelf_types.h"
 #include "ash/shelf/shelf_widget.h"
@@ -57,6 +56,8 @@ PanelWindowResizer::Create(WindowResizer* next_window_resizer,
 }
 
 void PanelWindowResizer::Drag(const gfx::Point& location, int event_flags) {
+  last_location_ = location;
+  wm::ConvertPointToScreen(GetTarget()->parent(), &last_location_);
   bool destroyed = false;
   if (!did_move_or_resize_) {
     did_move_or_resize_ = true;
@@ -124,6 +125,10 @@ aura::Window* PanelWindowResizer::GetTarget() {
   return next_window_resizer_->GetTarget();
 }
 
+const gfx::Point& PanelWindowResizer::GetInitialLocationForTest() const {
+  return details_.initial_location_in_parent;
+}
+
 PanelWindowResizer::PanelWindowResizer(WindowResizer* next_window_resizer,
                                        const Details& details)
     : details_(details),
@@ -204,9 +209,9 @@ void PanelWindowResizer::FinishDragging() {
   if (GetTarget()->GetProperty(internal::kPanelAttachedKey) !=
       should_attach_) {
     GetTarget()->SetProperty(internal::kPanelAttachedKey, should_attach_);
-    GetTarget()->SetDefaultParentByRootWindow(
-        GetTarget()->GetRootWindow(),
-        GetTarget()->GetBoundsInScreen());
+    gfx::Rect near_last_location(last_location_, gfx::Size());
+    GetTarget()->SetDefaultParentByRootWindow(GetTarget()->GetRootWindow(),
+                                              near_last_location);
   }
   if (panel_container_)
     GetPanelLayoutManager(panel_container_)->FinishDragging();