[Android] Add lint as a gyp action.

build/java_apk.gypi

Index: build/java_apk.gypi
diff --git a/build/java_apk.gypi b/build/java_apk.gypi
index 2485ed59d829f6f98c5d8b5d0a6301e12b4a2f27..f34df2bc5fba7317507666aab14302df2b898a84 100644
--- a/build/java_apk.gypi
+++ b/build/java_apk.gypi
@@ -91,6 +91,8 @@
     'native_libraries_template_data_file': '<(native_libraries_template_data_dir)/native_libraries_array.h',
     'native_libraries_template_data_stamp': '<(intermediate_dir)/native_libraries_template_data.stamp',
     'compile_stamp': '<(intermediate_dir)/compile.stamp',
+    'lint_stamp': '<(intermediate_dir)/lint.stamp',
+    'lint_result': '<(intermediate_dir)/lint_result.xml',
     'instr_stamp': '<(intermediate_dir)/instr.stamp',
     'jar_stamp': '<(intermediate_dir)/jar.stamp',
     'obfuscate_stamp': '<(intermediate_dir)/obfuscate.stamp',
@@ -547,6 +549,23 @@
       ],
     },
     {
+      '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': 'instr_classes_<(_target_name)',
       'message': 'Instrumenting <(_target_name) classes',
       'variables': {
@@ -555,12 +574,12 @@
         'stamp_path': '<(instr_stamp)',
         'instr_type': 'classes',
       },
+      'inputs': [
+        '<(lint_stamp)',
+      ],
       'outputs': [
         '<(instr_stamp)',
       ],
-      'inputs': [
-        '<(compile_stamp)',
-      ],
       'includes': [ 'android/instr_action.gypi' ],
     },
     {