Move IsStringUTF8/ASCII to base namespace

TBR=sky@chromium.org

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

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@268754 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: 52796541ecc14a0aa287ec0859e23350fed71278
diff --git a/base/files/file_path.cc b/base/files/file_path.cc
index f5a9e5a..a8b2713 100644
--- a/base/files/file_path.cc
+++ b/base/files/file_path.cc
@@ -521,7 +521,7 @@
 }
 
 FilePath FilePath::AppendASCII(const StringPiece& component) const {
-  DCHECK(IsStringASCII(component));
+  DCHECK(base::IsStringASCII(component));
 #if defined(OS_WIN)
   return Append(ASCIIToUTF16(component.as_string()));
 #elif defined(OS_POSIX)
@@ -587,7 +587,7 @@
 }
 
 std::string FilePath::MaybeAsASCII() const {
-  if (IsStringASCII(path_))
+  if (base::IsStringASCII(path_))
     return path_;
   return std::string();
 }
@@ -632,7 +632,7 @@
 }
 
 std::string FilePath::MaybeAsASCII() const {
-  if (IsStringASCII(path_))
+  if (base::IsStringASCII(path_))
     return UTF16ToASCII(path_);
   return std::string();
 }