Convert string16 to base::string16 in content.

content/renderer/android/email_detector_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 "content/renderer/android/email_detector.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 
 class EmailDetectorTest : public testing::Test {
  public:
   static void FindAndCheckEmail(const std::string& content,
                                 const std::string& expected) {
-    string16 content_16 = UTF8ToUTF16(content);
-    string16 result_16;
+    base::string16 content_16 = UTF8ToUTF16(content);
+    base::string16 result_16;
     size_t start, end;
     EmailDetector detector;
     std::string content_text;
     if (detector.FindContent(content_16.begin(), content_16.end(),
                              &start, &end, &content_text)) {
       result_16 = content_16.substr(start, end - start);
     }
     EXPECT_EQ(expected, UTF16ToUTF8(result_16));
     EXPECT_EQ(expected, content_text);
   }
@@ skipping 16 matching lines @@
   FindAndCheckEmail("Apples @2.50 each", "");
   FindAndCheckEmail("Log on to google.com", "");
   FindAndCheckEmail("Try someone@, they might know.", "");
   FindAndCheckEmail("No, bob@com is not an email address.", "");
   FindAndCheckEmail("@", "");
   FindAndCheckEmail("Just bob @google.com", "");
   FindAndCheckEmail("Why not call larry@google and ask him.", "");
 }
 
 }  // namespace content