Move AcceleratorController from WmShell to Shell

ash/common/accelerators/accelerator_router.cc

Index: ash/common/accelerators/accelerator_router.cc
diff --git a/ash/common/accelerators/accelerator_router.cc b/ash/common/accelerators/accelerator_router.cc
index c11c5f23c9a0f5accecc0e7cfe7903e8e60bdd65..971d0c44f28912e72c8d4a5e86b8523effcdb240 100644
--- a/ash/common/accelerators/accelerator_router.cc
+++ b/ash/common/accelerators/accelerator_router.cc
@@ -57,12 +57,12 @@ bool AcceleratorRouter::ProcessAccelerator(WmWindow* target,
       !CanConsumeSystemKeys(target, key_event)) {
     // System keys are always consumed regardless of whether they trigger an
     // accelerator to prevent windows from seeing unexpected key up events.
-    WmShell::Get()->accelerator_controller()->Process(accelerator);
+    Shell::Get()->accelerator_controller()->Process(accelerator);
     return true;
   }
   if (!ShouldProcessAcceleratorNow(target, key_event, accelerator))
     return false;
-  return WmShell::Get()->accelerator_controller()->Process(accelerator);
+  return Shell::Get()->accelerator_controller()->Process(accelerator);
 }
 
 void AcceleratorRouter::RecordSearchKeyStats(
@@ -108,7 +108,7 @@ bool AcceleratorRouter::ShouldProcessAcceleratorNow(
     return true;
 
   AcceleratorController* accelerator_controller =
-      WmShell::Get()->accelerator_controller();
+      Shell::Get()->accelerator_controller();
 
   // Reserved accelerators (such as Power button) always have a prority.
   if (accelerator_controller->IsReserved(accelerator))