Move IsStringASCII/UTF8 to base namespace.

base/command_line.cc

Index: base/command_line.cc
diff --git a/base/command_line.cc b/base/command_line.cc
index be6b4f2b1f4a0419ecd1c635109e4814cf220639..31426cba50a0d061e5b98d2bcaafe8eeb125b51b 100644
--- a/base/command_line.cc
+++ b/base/command_line.cc
@@ -304,7 +304,7 @@ bool CommandLine::HasSwitch(const std::string& switch_string) const {
 std::string CommandLine::GetSwitchValueASCII(
     const std::string& switch_string) const {
   StringType value = GetSwitchValueNative(switch_string);
-  if (!IsStringASCII(value)) {
+  if (!base::IsStringASCII(value)) {
     DLOG(WARNING) << "Value of switch (" << switch_string << ") must be ASCII.";
     return std::string();
   }
@@ -386,7 +386,7 @@ CommandLine::StringVector CommandLine::GetArgs() const {
 
 void CommandLine::AppendArg(const std::string& value) {
 #if defined(OS_WIN)
-  DCHECK(IsStringUTF8(value));
+  DCHECK(base::IsStringUTF8(value));
   AppendArgNative(base::UTF8ToWide(value));
 #elif defined(OS_POSIX)
   AppendArgNative(value);