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

chrome_elf/dll_hash.gypi

Index: chrome_elf/dll_hash.gypi
diff --git a/chrome_elf/dll_hash.gypi b/chrome_elf/dll_hash.gypi
new file mode 100644
index 0000000000000000000000000000000000000000..1e5242e7d28e5f96c0d171ec9df647e9ae10c608
--- /dev/null
+++ b/chrome_elf/dll_hash.gypi
@@ -0,0 +1,31 @@
+# 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.
+{
+  'targets': [
+    {
+      'target_name': 'dll_hash',
+      'type': 'static_library',
+      'dependencies': [
+        '../base/base.gyp:base',
+      ],
+      'sources': [
+        'dll_hash/dll_hash.cc',
+        'dll_hash/dll_hash.h',
+      ],
+    },
+    {
+      'target_name': 'dll_hash_main',
+      'type': 'executable',
+      'dependencies': [
+        'dll_hash',
+      ],
+      'include_dirs': [
+        '..',
+      ],
+      'sources': [
+        'dll_hash/dll_hash_main.cc',
+      ],
+    }
+  ]
+}