[Android] Add lint as a gyp action.

build/java.gypi

Index: build/java.gypi
diff --git a/build/java.gypi b/build/java.gypi
index 2e03bab7cceb7647af86c8d4285885c01dbc57a0..9d6f0bcfe1c9c938cd53de5dc1c41d3f7f496f91 100644
--- a/build/java.gypi
+++ b/build/java.gypi
@@ -73,6 +73,8 @@
     'intermediate_dir': '<(SHARED_INTERMEDIATE_DIR)/<(_target_name)',
     'classes_dir': '<(intermediate_dir)/classes',
     'compile_stamp': '<(intermediate_dir)/compile.stamp',
+    'lint_stamp': '<(intermediate_dir)/lint.stamp',
+    'lint_result': '<(intermediate_dir)/lint_result.xml',
     'proguard_config%': '',
     'proguard_preprocess%': '0',
     'variables': {
@@ -308,13 +310,30 @@
       ]
     },
     {
+      'variables': {
+        'src_dirs': [
+          '<(java_in_dir)/src',
+          '>@(additional_src_dirs)',
+        ],
+        'stamp_path': '<(lint_stamp)',
+        'result_path': '<(lint_result)',
+      },
+      'inputs': [
+        '<(compile_stamp)',
+      ],
+      'outputs': [
+        '<(lint_stamp)',
+      ],
+      'includes': [ 'android/lint_action.gypi' ],
+    },
+    {
       'action_name': 'jar_<(_target_name)',
       'message': 'Creating <(_target_name) jar',
       'inputs': [
         '<(DEPTH)/build/android/gyp/util/build_utils.py',
         '<(DEPTH)/build/android/gyp/util/md5_check.py',
         '<(DEPTH)/build/android/gyp/jar.py',
-        '<(compile_stamp)',
+        '<(lint_stamp)',
       ],
       'outputs': [
         '<(javac_jar_path)',