Do not toggle Applist with Search key press when accessibility is enabled.

ash/system/status_area_widget.cc

Index: ash/system/status_area_widget.cc
diff --git a/ash/system/status_area_widget.cc b/ash/system/status_area_widget.cc
index b3eb72fba8e75baa99980b9dba84d98f4483dff1..6d78f47b147f5bb05ba8b74a98dcea656b6efad5 100644
--- a/ash/system/status_area_widget.cc
+++ b/ash/system/status_area_widget.cc
@@ -115,12 +115,6 @@ class DummySystemTrayDelegate : public SystemTrayDelegate {
     caps_lock_enabled_ = enabled;
   }
 
-  virtual bool IsInAccessibilityMode() const OVERRIDE {
-    return false;
-  }
-
-  virtual void SetEnableSpokenFeedback(bool enable) OVERRIDE {}
-
   virtual void ShutDown() OVERRIDE {}
 
   virtual void SignOut() OVERRIDE {