Add components tests

components/components_tests.gypi

Index: components/components_tests.gypi
diff --git a/third_party/sudden_motion_sensor/sudden_motion_sensor.gyp b/components/components_tests.gypi
similarity index 54%
copy from third_party/sudden_motion_sensor/sudden_motion_sensor.gyp
copy to components/components_tests.gypi
index 897421b82532c6f1eae7a47aa49f2643546b5394..537a8c0b0d77ef1783028d15b7d58d5dea936114 100644
--- a/third_party/sudden_motion_sensor/sudden_motion_sensor.gyp
+++ b/components/components_tests.gypi
@@ -5,15 +5,15 @@
 {
   'targets': [
     {
-      'target_name': 'sudden_motion_sensor',
-      'type': 'static_library',
-      'dependencies': [
-        '<(DEPTH)/base/base.gyp:base',
-      ],
+      'target_name': 'components_unittests',
+      'type': '<(gtest_target_type)',
       'sources': [
-        'sudden_motion_sensor_mac.cc',
-        'sudden_motion_sensor_mac.h',
+        'test/run_all_unittests.cc',
+      ],
+      'dependencies': [
+        '../base/base.gyp:test_support_base',
+        '../testing/gtest.gyp:gtest',
       ],
-    },
-  ],
+    }
+  ]
 }