Prevents panels attached to shelf from docking

ash/wm/window_state.cc

 // Copyright 2013 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.
 
 #include "ash/wm/window_state.h"
 
 #include "ash/ash_switches.h"
 #include "ash/root_window_controller.h"
 #include "ash/screen_ash.h"
 #include "ash/shell_window_ids.h"
@@ skipping 15 matching lines @@
 
 WindowState::WindowState(aura::Window* window)
     : window_(window),
       window_position_managed_(false),
       bounds_changed_by_user_(false),
       panel_attached_(true),
       continue_drag_after_reparent_(false),
       ignored_by_shelf_(false),
       can_consume_system_keys_(false),
       top_row_keys_are_function_keys_(false),
-      window_resizer_(NULL),
       always_restores_to_restore_bounds_(false),
       hide_shelf_when_fullscreen_(true),
       animate_to_fullscreen_(true),
       minimum_visibility_(false),
       in_set_window_show_type_(false),
       window_show_type_(ToWindowShowType(GetShowState())) {
   window_->AddObserver(this);
 
 #if defined(OS_CHROMEOS)
   // NOTE(pkotwicz): Animating to immersive fullscreen does not look good. When
@@ skipping 198 matching lines @@
 }
 
 void WindowState::AddObserver(WindowStateObserver* observer) {
   observer_list_.AddObserver(observer);
 }
 
 void WindowState::RemoveObserver(WindowStateObserver* observer) {
   observer_list_.RemoveObserver(observer);
 }
 
+bool WindowState::CreateDragDetails(aura::Window* window,
+                                    const gfx::Point& point_in_parent,
+                                    int window_component,
+                                    aura::client::WindowMoveSource source) {
+  scoped_ptr<DragDetails> details(new DragDetails(
+        window, point_in_parent, window_component, source));
+  if (!details->is_resizable)
+    return false;
+  drag_details_ = details.Pass();
+  return true;
+}
+
+void WindowState::DeleteDragDetails() {
+  drag_details_.reset();
+}
+
 void WindowState::OnWindowPropertyChanged(aura::Window* window,
                                           const void* key,
                                           intptr_t old) {
   DCHECK_EQ(window, window_);
   if (key == aura::client::kShowStateKey)
     SetWindowShowType(ToWindowShowType(GetShowState()));
 }
 
 void WindowState::SnapWindow(WindowShowType left_or_right,
                              const gfx::Rect& bounds) {
@@ skipping 58 matching lines @@
   }
   return settings;
 }
 
 const WindowState* GetWindowState(const aura::Window* window) {
   return GetWindowState(const_cast<aura::Window*>(window));
 }
 
 }  // namespace wm
 }  // namespace ash