ui/gfx: Use base::string16 now that string16 was moved into base namespace.

ui/gfx/canvas_unittest.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 <limits>
 
 #include "base/strings/utf_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/font.h"
 
 namespace gfx {
 
 class CanvasTest : public testing::Test {
  protected:
   int GetStringWidth(const char *text) {
     return Canvas::GetStringWidth(UTF8ToUTF16(text), font_);
   }
 
   gfx::Size SizeStringInt(const char *text, int width, int line_height) {
-    string16 text16 = UTF8ToUTF16(text);
+    base::string16 text16 = UTF8ToUTF16(text);
     int height = 0;
-    int flags = (text16.find('\n') != string16::npos) ? Canvas::MULTI_LINE : 0;
+    int flags =
+      (text16.find('\n') != base::string16::npos) ? Canvas::MULTI_LINE : 0;
     Canvas::SizeStringInt(text16, font_, &width, &height, line_height, flags);
     return gfx::Size(width, height);
   }
 
  private:
   gfx::Font font_;
 };
 
 TEST_F(CanvasTest, StringWidth) {
   EXPECT_GT(GetStringWidth("Test"), 0);
@@ skipping 17 matching lines @@
 #endif
 
 TEST_F(CanvasTest, MAYBE_StringSizeWithLineHeight) {
   gfx::Size one_line_size = SizeStringInt("Q", 0, 0);
   gfx::Size four_line_size = SizeStringInt("Q\nQ\nQ\nQ", 1000000, 1000);
   EXPECT_EQ(one_line_size.width(), four_line_size.width());
   EXPECT_EQ(3 * 1000 + one_line_size.height(), four_line_size.height());
 }
 
 }  // namespace gfx