Add haha to third-party

It is a dependency of Leak Canary, which I'd like to add next.

BUG=505909

Review URL: https://codereview.chromium.org/1261873003

Cr-Commit-Position: refs/heads/master@{#374846}

third_party/haha/BUILD.gn

+# Copyright 2016 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.
+
+import("//build/config/android/rules.gni")
+
+java_prebuilt("haha") {
+  jar_path = "haha-2.0.2.jar"
+}

third_party/haha/OWNERS

+agrieve@chromium.org
+yfriedman@chromium.org

third_party/haha/README.chromium

+Name: Headless Android Heap Analyzer
+Short Name: haha
+URL: https://github.com/square/haha
+Version: 2.0.2
+Revision: a86bf3ef22a5c8dec638ded87e984fb62f344510
+License: Apache 2.0, LGPL 2.1
+License File: LICENSE
+Security Critical: no
+
+Description:
+HAHA is a Java library used by Leak Canary to analyze Android heap dumps.
+It is essentially a repackaging of Android's perflib, with its dependencies
+(guava and trove4j) bundled in and Proguarded.
+
+Local Modifications:
+None
+
+How to build the .jar:
+git clone https://github.com/square/haha
+cd haha
+git checkout haha-2.0.2
+git submodule update --init
+mvn package

third_party/haha/haha.gyp

+# Copyright 2015 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': 'haha_java',
+      'type': 'none',
+      'variables': {
+        'jar_path': 'haha-2.0.2.jar',
+      },
+      'includes': [ '../../build/java_prebuilt.gypi' ],
+    },
+  ],
+}