Move StartsWith[ASCII] to base namespace.

chrome/browser/media_galleries/media_folder_finder.cc

Index: chrome/browser/media_galleries/media_folder_finder.cc
diff --git a/chrome/browser/media_galleries/media_folder_finder.cc b/chrome/browser/media_galleries/media_folder_finder.cc
index 1d72012f77b98d9c299b8be99da71ebf03514b6a..b80b1bfdde913a698e9007f9e9dc95b8ac28e916 100644
--- a/chrome/browser/media_galleries/media_folder_finder.cc
+++ b/chrome/browser/media_galleries/media_folder_finder.cc
@@ -98,8 +98,8 @@ bool ShouldIgnoreScanRoot(const base::FilePath& path) {
   return mount_point.IsParent(path);
 #elif defined(OS_LINUX)
   // /media and /mnt are likely the only places with interesting mount points.
-  if (StartsWithASCII(path.value(), "/media", true) ||
-      StartsWithASCII(path.value(), "/mnt", true)) {
+  if (base::StartsWithASCII(path.value(), "/media", true) ||
+      base::StartsWithASCII(path.value(), "/mnt", true)) {
     return false;
   }
   return true;