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

chrome_elf/dll_hash/dll_hash_main.cc

Index: chrome_elf/dll_hash/dll_hash_main.cc
diff --git a/chrome_elf/dll_hash/dll_hash_main.cc b/chrome_elf/dll_hash/dll_hash_main.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9ddafd676fbc36d14a8547d22c692e61bd5161d2
--- /dev/null
+++ b/chrome_elf/dll_hash/dll_hash_main.cc
@@ -0,0 +1,28 @@
+// 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_for_uma/dll_hash_for_uma.h"
+
+int main(int argc, char **argv) {
+  if (argc < 2) {
+    fprintf(stderr, "Usage: %s <dll name> <dll name> <...>\n", argv[0]);

[robertshield, 2014/02/26 19:57:10]

This is probably fine (it's just a usage string), but be aware that it is
possible on Windows for argv[0] to not be the executable name (see
http://msdn.microsoft.com/en-us/library/88w63h9k.aspx). I don't see a reason to
change this code given the intended usage though.

+    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;
+}