Add UMA stats to record when DLLs are successfully blocked in the Browser.

chrome_elf/dll_hash/dll_hash_main.cc

+// Copyright (c) 2014 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.
+//
+// This is a utility executable used for generating hashes for dll names
+// for inclusion in tools/metrics/histograms/histograms.xml. Every
+// dll name must have a corresponding entry in the enum there.
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "chrome_elf/dll_hash/dll_hash.h"
+
+int main(int argc, char** argv) {
+  if (argc < 2) {
+    fprintf(stderr, "Usage: %s <dll name> <dll name> <...>\n", argv[0]);
+    fprintf(stderr, "\n");
+    fprintf(stderr, "Prints hashes for dll names.\n");
+    fprintf(stderr, "Example: %s \"my_dll.dll\" \"user32.dll\"\n", argv[0]);
+    return 1;
+  }
+  for (int i = 1; i < argc; i++) {
+    int hash = DllNameToHash(std::string(argv[i]));
+    printf("<int value=\"%d\" label=\"%s\"/>\n", hash, argv[i]);
+  }
+  return 0;
+}