Fix "unused variable" warnings.

ui/base/ime/input_method_auralinux_unittest.cc

 // Copyright 2015 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 "ui/base/ime/input_method_auralinux.h"
 
 #include <stddef.h>
 
 #include "base/macros.h"
 #include "base/memory/singleton.h"
@@ skipping 39 matching lines @@
     expected_actions_.clear();
   }
 
  private:
   std::vector<base::string16> recorded_actions_;
   std::vector<base::string16> expected_actions_;
 };
 
 class LinuxInputMethodContextForTesting : public LinuxInputMethodContext {
  public:
-  LinuxInputMethodContextForTesting(LinuxInputMethodContextDelegate* delegate,
-                                    bool is_simple)
+  explicit LinuxInputMethodContextForTesting(
+      LinuxInputMethodContextDelegate* delegate)
       : delegate_(delegate),
-        is_simple_(is_simple),
         is_sync_mode_(false),
         eat_key_(false),
         focused_(false) {}
 
   void SetSyncMode(bool is_sync_mode) { is_sync_mode_ = is_sync_mode; }
   void SetEatKey(bool eat_key) { eat_key_ = eat_key; }
 
   void AddCommitAction(const std::string& text) {
     actions_.push_back(base::ASCIIToUTF16("C:" + text));
   }
@@ skipping 48 matching lines @@
 
   void Blur() override { focused_ = false; }
 
   void SetCursorLocation(const gfx::Rect& rect) override {
     cursor_position_ = rect;
   }
 
  private:
   LinuxInputMethodContextDelegate* delegate_;
   std::vector<base::string16> actions_;
-  bool is_simple_;
   bool is_sync_mode_;
   bool eat_key_;
   bool focused_;
   gfx::Rect cursor_position_;
 
   DISALLOW_COPY_AND_ASSIGN(LinuxInputMethodContextForTesting);
 };
 
 class LinuxInputMethodContextFactoryForTesting
     : public LinuxInputMethodContextFactory {
  public:
   LinuxInputMethodContextFactoryForTesting(){};
 
   std::unique_ptr<LinuxInputMethodContext> CreateInputMethodContext(
       LinuxInputMethodContextDelegate* delegate,
       bool is_simple) const override {
     return std::unique_ptr<ui::LinuxInputMethodContext>(
-        new LinuxInputMethodContextForTesting(delegate, is_simple));
+        new LinuxInputMethodContextForTesting(delegate));
   };
 
  private:
   DISALLOW_COPY_AND_ASSIGN(LinuxInputMethodContextFactoryForTesting);
 };
 
 class InputMethodDelegateForTesting : public internal::InputMethodDelegate {
  public:
   InputMethodDelegateForTesting(){};
   ~InputMethodDelegateForTesting() override{};
@@ skipping 596 matching lines @@
   input_method_auralinux_->DispatchKeyEvent(&key);
 
   test_result_->ExpectAction("textinput:c");
   test_result_->ExpectAction("keydown:65");
   test_result_->ExpectAction("keypress:65");
   test_result_->Verify();
 }
 
 }  // namespace
 }  // namespace ui