Enables docked windows by default

ash/wm/dock/docked_window_resizer.cc

Index: ash/wm/dock/docked_window_resizer.cc
diff --git a/ash/wm/dock/docked_window_resizer.cc b/ash/wm/dock/docked_window_resizer.cc
index 28d043848b298463ceae29a7f7289faed357b3df..a1de2398c961e1b074a7ef4e50274fc3b8dfd83c 100644
--- a/ash/wm/dock/docked_window_resizer.cc
+++ b/ash/wm/dock/docked_window_resizer.cc
@@ -4,7 +4,6 @@
 
 #include "ash/wm/dock/docked_window_resizer.h"
 
-#include "ash/ash_switches.h"
 #include "ash/display/display_controller.h"
 #include "ash/launcher/launcher.h"
 #include "ash/root_window_controller.h"
@@ -124,8 +123,7 @@ void DockedWindowResizer::CompleteDrag(int event_flags) {
   // windows.
   wm::WindowState* window_state = wm::GetWindowState(GetTarget());
   bool was_tracked_by_workspace = window_state->tracked_by_workspace();
-  if (was_docked_)
-    window_state->SetTrackedByWorkspace(false);
+  window_state->SetTrackedByWorkspace(false);

[varkha, 2013/11/05 20:47:24]

This change is from https://codereview.chromium.org/57963003/

   // The root window can change when dragging into a different screen.
   next_window_resizer_->CompleteDrag(event_flags);
   FinishedDragging();
@@ -138,13 +136,15 @@ void DockedWindowResizer::RevertDrag() {
   // windows.
   wm::WindowState* window_state = wm::GetWindowState(GetTarget());
   bool was_tracked_by_workspace = window_state->tracked_by_workspace();
-  if (was_docked_)
-    window_state->SetTrackedByWorkspace(false);
+  window_state->SetTrackedByWorkspace(false);

[varkha, 2013/11/05 20:47:24]

This change is from https://codereview.chromium.org/57963003/

   next_window_resizer_->RevertDrag();
   // Restore docked state to what it was before the drag if necessary.
-  if (was_docked_ && !is_docked_) {
-    dock_layout_->DockDraggedWindow(GetTarget());
+  if (was_docked_ != is_docked_) {
     is_docked_ = was_docked_;
+    if (is_docked_)
+      dock_layout_->DockDraggedWindow(GetTarget());
+    else
+      dock_layout_->UndockDraggedWindow();
   }
   FinishedDragging();
   window_state->SetTrackedByWorkspace(was_tracked_by_workspace);