drive: Do not rely on argument-dependent lookup when calling MD5DigestToBase16().

chrome/browser/drive/drive_api_util.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/drive/drive_api_util.h"
 
 #include <string>
 
 #include "base/files/file.h"
 #include "base/logging.h"
@@ skipping 150 matching lines @@
       // End of file.
       break;
     }
 
     offset += result;
     base::MD5Update(&context, base::StringPiece(buffer.get(), result));
   }
 
   base::MD5Digest digest;
   base::MD5Final(&digest, &context);
-  return MD5DigestToBase16(digest);
+  return base::MD5DigestToBase16(digest);
 }
 
 FileStreamMd5Digester::FileStreamMd5Digester()
     : buffer_(new net::IOBuffer(kMd5DigestBufferSize)) {
 }
 
 FileStreamMd5Digester::~FileStreamMd5Digester() {
 }
 
 void FileStreamMd5Digester::GetMd5Digest(
@@ skipping 18 matching lines @@
 void FileStreamMd5Digester::OnChunkRead(const ResultCallback& callback,
                                         int bytes_read) {
   if (bytes_read < 0) {
     // Error - just return empty string.
     callback.Run("");
     return;
   } else if (bytes_read == 0) {
     // EOF.
     base::MD5Digest digest;
     base::MD5Final(&digest, &md5_context_);
-    std::string result = MD5DigestToBase16(digest);
+    std::string result = base::MD5DigestToBase16(digest);
     callback.Run(result);
     return;
   }
 
   // Read data and digest it.
   base::MD5Update(&md5_context_,
                   base::StringPiece(buffer_->data(), bytes_read));
 
   // Kick off the next read.
   ReadNextChunk(callback);
@@ skipping 19 matching lines @@
   const std::string extension = base::FilePath(path.Extension()).AsUTF8Unsafe();
   for (size_t i = 0; i < arraysize(kHostedDocumentKinds); ++i) {
     if (extension == kHostedDocumentKinds[i].extension)
       return true;
   }
   return extension == kUnknownHostedDocumentExtension;
 }
 
 }  // namespace util
 }  // namespace drive