Add initial test and build files for Robolectric unit test suites.

chrome/chrome_tests.gypi

 # Copyright 2013 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.
 {
   'variables': {
     'chrome_browser_extensions_test_support_sources': [
       # A list of sources which is shared between different browser tests.
       'browser/apps/app_browsertest_util.cc',
       'browser/apps/app_browsertest_util.h',
       'browser/extensions/browsertest_util.cc',
@@ skipping 2908 matching lines @@
           ],
           'variables': {
             'apk_name': 'ChromeShellTest',
             'java_in_dir': 'android/shell/javatests',
             'additional_src_dirs': ['android/javatests/src'],
             'is_test_apk': 1,
           },
           'includes': [ '../build/java_apk.gypi' ],
         },
         {
+          # GN: //chrome/android:chrome_shell_unit_tests
+          'target_name': 'chrome_shell_unit_tests',
+          'type': 'none',
+          'dependencies': [
+            'chrome_java',
+            '../base/base.gyp:base',
+            '../base/base.gyp:base_java_test_support',
+            '../testing/android/junit/junit_test.gyp:junit_test_support',
+          ],
+          'variables': {
+            'main_class': 'org.chromium.testing.local.JunitTestMain',
+            'src_paths': [
+              'android/junit/',
+            ],
+          },
+          'includes': [
+            '../build/host_jar.gypi',
+          ],
+        },
+        {
           # GN: //chrome/test/chromedriver/test/webview_shell:chromedriver_webview_shell_apk
           'target_name': 'chromedriver_webview_shell_apk',
           'type': 'none',
           'variables': {
             'apk_name': 'ChromeDriverWebViewShell',
             'java_in_dir': 'test/chromedriver/test/webview_shell/java',
             'resource_dir': 'test/chromedriver/test/webview_shell/java/res',
           },
           'includes': [ '../build/java_apk.gypi' ],
         },
@@ skipping 238 matching lines @@
             ['enable_webrtc==1', {
               'dependencies': [
                 '../third_party/libjingle/libjingle.gyp:libjingle_webrtc'
               ]
             }],
           ],
         }]
     }],
   ],  # 'conditions'
 }