Move IsStringASCII/UTF8 to base namespace.

webkit/common/database/database_identifier.cc

Index: webkit/common/database/database_identifier.cc
diff --git a/webkit/common/database/database_identifier.cc b/webkit/common/database/database_identifier.cc
index 332dfb8b0cc4ec7ad1c596e19dff76b59d565d4d..50331eea3806ac8fa0557940f95390ff25afa9e1 100644
--- a/webkit/common/database/database_identifier.cc
+++ b/webkit/common/database/database_identifier.cc
@@ -56,7 +56,7 @@ DatabaseIdentifier DatabaseIdentifier::CreateFromOrigin(const GURL& origin) {
 
 // static
 DatabaseIdentifier DatabaseIdentifier::Parse(const std::string& identifier) {
-  if (!IsStringASCII(identifier))
+  if (!base::IsStringASCII(identifier))
     return DatabaseIdentifier();
 
   size_t first_underscore = identifier.find_first_of('_');