Makes WorkspaceWindowResizer use ash/wm/common types

ash/wm/aura/wm_globals_aura.cc

Index: ash/wm/aura/wm_globals_aura.cc
diff --git a/ash/wm/aura/wm_globals_aura.cc b/ash/wm/aura/wm_globals_aura.cc
index 1fe39cb62c461e058190e65bfcc247e74b3fd497..c50c72683afb08f1bed7c82eb0b0d3869784a888 100644
--- a/ash/wm/aura/wm_globals_aura.cc
+++ b/ash/wm/aura/wm_globals_aura.cc
@@ -98,6 +98,10 @@ std::vector<WmWindow*> WmGlobalsAura::GetAllRootWindows() {
   return wm_windows;
 }
 
+UserMetricsRecorder* WmGlobalsAura::GetUserMetricsRecorder() {
+  return Shell::GetInstance()->metrics();
+}
+
 void WmGlobalsAura::AddActivationObserver(WmActivationObserver* observer) {
   if (!added_activation_observer_) {
     added_activation_observer_ = true;