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

chrome/common/extensions/extension_file_util_unittest.cc

Index: chrome/common/extensions/extension_file_util_unittest.cc
diff --git a/chrome/common/extensions/extension_file_util_unittest.cc b/chrome/common/extensions/extension_file_util_unittest.cc
index 71db8c9203747b215aebf6ba8a917d808546f3ca..bf541495dc7ae337af028c84c7d7d64fca62200d 100644
--- a/chrome/common/extensions/extension_file_util_unittest.cc
+++ b/chrome/common/extensions/extension_file_util_unittest.cc
@@ -311,7 +311,8 @@ TEST_F(ExtensionFileUtilTest, BackgroundScriptsMustExist) {
   EXPECT_FALSE(extension_file_util::ValidateExtension(
       extension.get(), &error, &warnings));
   EXPECT_EQ(l10n_util::GetStringFUTF8(
-      IDS_EXTENSION_LOAD_BACKGROUND_SCRIPT_FAILED, ASCIIToUTF16("foo.js")),
+      IDS_EXTENSION_LOAD_BACKGROUND_SCRIPT_FAILED,
+      base::ASCIIToUTF16("foo.js")),
            error);
   EXPECT_EQ(0U, warnings.size());
 
@@ -327,7 +328,7 @@ TEST_F(ExtensionFileUtilTest, BackgroundScriptsMustExist) {
       extension.get(), &error, &warnings));
   EXPECT_EQ(l10n_util::GetStringFUTF8(
       IDS_EXTENSION_LOAD_BACKGROUND_SCRIPT_FAILED,
-      ASCIIToUTF16("http://google.com/foo.js")),
+      base::ASCIIToUTF16("http://google.com/foo.js")),
            error);
   EXPECT_EQ(0U, warnings.size());
 }