Move IsStringUTF8/ASCII to base namespace

[email protected]

Review URL: https://codereview.chromium.org/270183002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@268754 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/dbus/message.cc b/dbus/message.cc
index eaf3c9b..c9219b7e 100644
--- a/dbus/message.cc
+++ b/dbus/message.cc
@@ -507,7 +507,7 @@
 
 void MessageWriter::AppendString(const std::string& value) {
   // D-Bus Specification (0.19) says a string "must be valid UTF-8".
-  CHECK(IsStringUTF8(value));
+  CHECK(base::IsStringUTF8(value));
   const char* pointer = value.c_str();
   AppendBasic(DBUS_TYPE_STRING, &pointer);
   // TODO(satorux): It may make sense to return an error here, as the