Move RemoveChars, ReplaceChars, TrimString, and TruncateUTF8ToByteSize to base namespace.

webkit/child/multipart_response_delegate.cc

Index: webkit/child/multipart_response_delegate.cc
diff --git a/webkit/child/multipart_response_delegate.cc b/webkit/child/multipart_response_delegate.cc
index 550aab3ee2ffc5136d93b902116c632b6ce57e9d..a1e5702fa138753553d965a0ca0f2a30b917f11e 100644
--- a/webkit/child/multipart_response_delegate.cc
+++ b/webkit/child/multipart_response_delegate.cc
@@ -319,7 +319,7 @@ bool MultipartResponseDelegate::ReadMultipartBoundary(
   // The byte range response can have quoted boundary strings. This is legal
   // as per MIME specifications. Individual data fragements however don't
   // contain quoted boundary strings.
-  TrimString(*multipart_boundary, "\"", multipart_boundary);
+  base::TrimString(*multipart_boundary, "\"", multipart_boundary);
   return true;
 }