Delete an unused variable

chrome/browser/chromeos/input_method/input_method_engine.cc

 // Copyright (c) 2012 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 "chrome/browser/chromeos/input_method/input_method_engine.h"
 
 #include <map>
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 506 matching lines @@
     DVLOG(1) << "Unknown button: " << button;
     pressed_button = MOUSE_BUTTON_LEFT;
   }
 
   observer_->OnCandidateClicked(
       engine_id_, candidate_ids_.at(index), pressed_button);
 }
 
 class InputMethodEngineStub : public InputMethodEngine {
  public:
-  InputMethodEngineStub()
-      : observer_(NULL), active_(false) {}
-
-  ~InputMethodEngineStub() {
-  }
+  InputMethodEngineStub() : active_(false) {}
+  ~InputMethodEngineStub() {}
 
   bool Init(InputMethodEngine::Observer* observer,
             const char* engine_name,
             const char* extension_id,
             const char* engine_id,
             const char* description,
             const char* language,
             const std::vector<std::string>& layouts,
             std::string* error) {
     DVLOG(1) << "Init";
@@ skipping 71 matching lines @@
   virtual bool IsActive() const {
     DVLOG(1) << "IsActive";
     return active_;
   }
 
   virtual void KeyEventDone(input_method::KeyEventHandle* key_data,
                             bool handled) {
   }
 
  private:
-  // Pointer to the object recieving events for this IME.
-  InputMethodEngine::Observer* observer_;
-
   // True when this IME is active, false if deactive.
   bool active_;
 
   // User specified id of this IME.
   std::string engine_id_;
 };
 
 InputMethodEngine* InputMethodEngine::CreateEngine(
     InputMethodEngine::Observer* observer,
     const char* engine_name,
@@ skipping 14 matching lines @@
                         description, language, layouts, error)) {
     DVLOG(1) << "Init() failed.";
     delete new_engine;
     new_engine = NULL;
   }
 
   return new_engine;
 }
 
 }  // namespace chromeos