Update uses of UTF conversions in content/ to use the base:: namespace.

content/common/sandbox_mac_diraccess_unittest.mm

 // 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.
 
 #import <Cocoa/Cocoa.h>
 #include <dirent.h>
 
 extern "C" {
 #include <sandbox.h>
 }
@@ skipping 81 matching lines @@
     EXPECT_TRUE(Sandbox::QuoteStringForRegex(ok_string, &out));
   }
 
   // Check that all characters whose values are larger than 126 [7E] are
   // rejected by the regex escaping code.
   {
     std::string out;
     EXPECT_TRUE(Sandbox::QuoteStringForRegex("}", &out));   // } == 0x7D == 125
     EXPECT_FALSE(Sandbox::QuoteStringForRegex("~", &out));  // ~ == 0x7E == 126
     EXPECT_FALSE(
-        Sandbox::QuoteStringForRegex(WideToUTF8(L"^\u2135.\u2136$"), &out));
+        Sandbox::QuoteStringForRegex(base::WideToUTF8(L"^\u2135.\u2136$"),
+                                     &out));
   }
 
   {
     for (size_t i = 0; i < ARRAYSIZE_UNSAFE(regex_cases); ++i) {
       std::string out;
-      std::string in = WideToUTF8(regex_cases[i].to_escape);
+      std::string in = base::WideToUTF8(regex_cases[i].to_escape);
       EXPECT_TRUE(Sandbox::QuoteStringForRegex(in, &out));
       std::string expected("^");
       expected.append(regex_cases[i].escaped);
       expected.append(kSandboxEscapeSuffix);
       EXPECT_EQ(expected, out);
     }
   }
 
   {
     std::string in_utf8("\\^.$|()[]*+?{}");
@@ skipping 184 matching lines @@
     PLOG(ERROR) << "Sandbox breach: was able to write ("
                 << denied_file2.value()
                 << ")";
     return -1;
   }
 
   return 0;
 }
 
 }  // namespace content