Add a copy of the SMHasher library. MurmurHash3 will be used by SafeBrowsing phishing detection.

We'll be modifying the page_words field in ClientSideModel with murmurhash3's of the words, rather than SHA-256 hashes, since SHA-256 is fairly expensive to compute.  Note that on a murmurhash3 hit, we'll still do a SHA-256 check against page_terms, so this will not introduce term collisions.

BUG=none
TEST=none


Review URL: http://codereview.chromium.org/7848010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@100347 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 51 insertions, 0 deletions

diff --git a/third_party/smhasher/LICENSE b/third_party/smhasher/LICENSE
new file mode 100644
index 0000000..3f18a84
--- /dev/null
+++ b/third_party/smhasher/LICENSE
@@ -0,0 +1,23 @@
+All MurmurHash source files are placed in the public domain.
+
+The license below applies to all other code in SMHasher:
+
+Copyright (c) 2011 Google, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/third_party/smhasher/README.chromium b/third_party/smhasher/README.chromium
new file mode 100644
index 0000000..dcf4bce
--- /dev/null
+++ b/third_party/smhasher/README.chromium
@@ -0,0 +1,12 @@
+Name: SMHasher
+URL: http://code.google.com/p/smhasher/
+Version: 0
+Revision: 136
+License: MIT (SMHasher), Public Domain (MurmurHash)
+License File: LICENSE
+Security Critical: yes
+
+Description:
+This is a library containing the MurmurHash3 function, and a hashing function
+test suite.
+
diff --git a/third_party/smhasher/smhasher.gyp b/third_party/smhasher/smhasher.gyp
new file mode 100644
index 0000000..fa59c2c
--- /dev/null
+++ b/third_party/smhasher/smhasher.gyp
@@ -0,0 +1,16 @@
+# Copyright (c) 2011 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': 'murmurhash3',
+      'type': 'static_library',
+      'sources': [
+        'src/MurmurHash3.h',
+        'src/MurmurHash3.cpp',
+      ],
+    },
+  ],
+}