Move StringToUpperASCII and LowerCaseEqualsASCII to the base namespace

base/files/file_path.cc

Index: base/files/file_path.cc
diff --git a/base/files/file_path.cc b/base/files/file_path.cc
index a8b271399883e8b79119d477332506106106d130..2496e1768ff6fb7b168158afca37736dd8cd1f3f 100644
--- a/base/files/file_path.cc
+++ b/base/files/file_path.cc
@@ -141,13 +141,14 @@ StringType::size_type ExtensionSeparatorPosition(const StringType& path) {
 
   for (size_t i = 0; i < arraysize(kCommonDoubleExtensions); ++i) {
     StringType extension(path, penultimate_dot + 1);
-    if (LowerCaseEqualsASCII(extension, kCommonDoubleExtensions[i]))
+    if (base::LowerCaseEqualsASCII(extension, kCommonDoubleExtensions[i]))
       return penultimate_dot;
   }
 
   StringType extension(path, last_dot + 1);
   for (size_t i = 0; i < arraysize(kCommonDoubleExtensionSuffixes); ++i) {
-    if (LowerCaseEqualsASCII(extension, kCommonDoubleExtensionSuffixes[i])) {
+    if (base::LowerCaseEqualsASCII(extension,
+                                   kCommonDoubleExtensionSuffixes[i])) {
       if ((last_dot - penultimate_dot) <= 5U &&
           (last_dot - penultimate_dot) > 1U) {
         return penultimate_dot;