Move EmptyString, kWhitespace and the BOM to base.

chrome/browser/drive/drive_api_util.cc

Index: chrome/browser/drive/drive_api_util.cc
diff --git a/chrome/browser/drive/drive_api_util.cc b/chrome/browser/drive/drive_api_util.cc
index 732ab63e2ab8ead22e40d0839de910de3e6d4a77..845e5d2e91ae5e59e7195e2b1d373bd0eee54703 100644
--- a/chrome/browser/drive/drive_api_util.cc
+++ b/chrome/browser/drive/drive_api_util.cc
@@ -162,12 +162,12 @@ std::string TranslateQuery(const std::string& original_query) {
   // In order to handle non-ascii white spaces correctly, convert to UTF16.
   base::string16 query = UTF8ToUTF16(original_query);
   const base::string16 kDelimiter(
-      kWhitespaceUTF16 + base::string16(1, static_cast<char16>('"')));
+      base::kWhitespaceUTF16 + base::string16(1, static_cast<char16>('"')));
 
   std::string result;
-  for (size_t index = query.find_first_not_of(kWhitespaceUTF16);
+  for (size_t index = query.find_first_not_of(base::kWhitespaceUTF16);
        index != base::string16::npos;
-       index = query.find_first_not_of(kWhitespaceUTF16, index)) {
+       index = query.find_first_not_of(base::kWhitespaceUTF16, index)) {
     bool is_exclusion = (query[index] == '-');
     if (is_exclusion)
       ++index;