Cleanup: Convert ASCIIToUTF16("") to string16().

ui/views/controls/textfield/textfield_views_model_unittest.cc

 // Copyright (c) 2011 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 <vector>
 
 #include "base/auto_reset.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
+#include "base/string16.h"
 #include "base/utf_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/clipboard/clipboard.h"
 #include "ui/base/clipboard/scoped_clipboard_writer.h"
 #include "ui/base/range/range.h"
 #include "ui/gfx/render_text.h"
 #include "ui/views/controls/textfield/textfield.h"
 #include "ui/views/controls/textfield/textfield_views_model.h"
 #include "ui/views/test/test_views_delegate.h"
 #include "ui/views/test/views_test_base.h"
@@ skipping 22 matching lines @@
       : ViewsTestBase(),
         composition_text_confirmed_or_cleared_(false) {
   }
 
   virtual void OnCompositionTextConfirmedOrCleared() {
     composition_text_confirmed_or_cleared_ = true;
   }
 
  protected:
   void ResetModel(TextfieldViewsModel* model) const {
-    model->SetText(ASCIIToUTF16(""));
+    model->SetText(string16());
     model->ClearEditHistory();
   }
 
   bool composition_text_confirmed_or_cleared_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TextfieldViewsModelTest);
 };
 
 #define EXPECT_STR_EQ(ascii, utf16) \
@@ skipping 428 matching lines @@
   EXPECT_EQ(5U, model.GetCursorPosition());
   model.SelectAll();
   EXPECT_STR_EQ("GOODBYE", model.GetSelectedText());
   model.MoveCursorRight(gfx::LINE_BREAK, false);
   EXPECT_EQ(7U, model.GetCursorPosition());
 
   model.SetText(ASCIIToUTF16("BYE"));
   // Setting shorter string moves the cursor to the end of the new string.
   EXPECT_EQ(3U, model.GetCursorPosition());
   EXPECT_EQ(string16(), model.GetSelectedText());
-  model.SetText(ASCIIToUTF16(""));
+  model.SetText(string16());
   EXPECT_EQ(0U, model.GetCursorPosition());
 }
 
 #if defined(USE_AURA) && defined(OS_LINUX)
 #define MAYBE_Clipboard DISABLED_Clipboard  // http://crbug.com/97845
 #else
 #define MAYBE_Clipboard Clipboard
 #endif
 TEST_F(TextfieldViewsModelTest, MAYBE_Clipboard) {
   ui::Clipboard* clipboard
@@ skipping 1014 matching lines @@
   EXPECT_TRUE(model.Undo());
   EXPECT_STR_EQ("ABCDE", model.GetText());
   EXPECT_TRUE(model.Redo());
   EXPECT_STR_EQ("1234", model.GetText());
   EXPECT_FALSE(model.Redo());
 
   // TODO(oshima): We need MockInputMethod to test the behavior with IME.
 }
 
 }  // namespace views