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

chrome/browser/shell_integration_linux_unittest.cc

Index: chrome/browser/shell_integration_linux_unittest.cc
diff --git a/chrome/browser/shell_integration_linux_unittest.cc b/chrome/browser/shell_integration_linux_unittest.cc
index b595e364a58dffc881d98951c8e9cdce1187d54f..3bb6ba4935cadbd5ae9048e8eff4bee526727872 100644
--- a/chrome/browser/shell_integration_linux_unittest.cc
+++ b/chrome/browser/shell_integration_linux_unittest.cc
@@ -573,7 +573,7 @@ TEST(ShellIntegrationTest, GetDesktopFileContents) {
             GURL(test_cases[i].url),
             std::string(),
             base::FilePath(),
-            ASCIIToUTF16(test_cases[i].title),
+            base::ASCIIToUTF16(test_cases[i].title),
             test_cases[i].icon_name,
             base::FilePath(),
             test_cases[i].nodisplay));
@@ -618,7 +618,7 @@ TEST(ShellIntegrationTest, GetDirectoryFileContents) {
     EXPECT_EQ(
         test_cases[i].expected_output,
         ShellIntegrationLinux::GetDirectoryFileContents(
-            ASCIIToUTF16(test_cases[i].title),
+            base::ASCIIToUTF16(test_cases[i].title),
             test_cases[i].icon_name));
   }
 }