[Android] Sets up a coverage system for java using EMMA

build/java.gypi

Index: build/java.gypi
diff --git a/build/java.gypi b/build/java.gypi
index ec8431b92da2e05417a7e716c1eb0d9ad2b69435..297dee71b469f90925caf716ae46cda698c992fe 100644
--- a/build/java.gypi
+++ b/build/java.gypi
@@ -59,6 +59,7 @@
     'jar_excluded_classes': [ '*/R.class', '*/R##*.class' ],
     'additional_input_paths': [],
     'dex_path': '<(PRODUCT_DIR)/lib.java/<(_target_name).dex.jar',
+    'emma_device_jar': '<(android_sdk_root)/tools/lib/emma_device.jar',
     'generated_src_dirs': ['>@(generated_R_dirs)'],
     'generated_R_dirs': [],
     'has_java_resources%': 0,
@@ -70,6 +71,13 @@
     'intermediate_dir': '<(SHARED_INTERMEDIATE_DIR)/<(_target_name)',
     'classes_dir': '<(intermediate_dir)/classes',
     'compile_stamp': '<(intermediate_dir)/compile.stamp',
+    'conditions': [
+      ['coverage == 1', {
+        'classes_final_dir': '<(intermediate_dir)/classes_instr',
+      }, {
+        'classes_final_dir': '<(intermediate_dir)/classes',
+      }]
+    ]
   },
   # This all_dependent_settings is used for java targets only. This will add the
   # jar path to the classpath of dependent java targets.
@@ -214,6 +222,34 @@
         },
       ],
     }],
+    ['coverage == 1', {
+      'actions': [
+        {
+          'action_name': 'emma_instr_<(_target_name)',
+          'message': 'Instrumenting <(_target_name) classes',
+          'inputs': [
+            '<(compile_stamp)',
+            '<(DEPTH)/build/android/ant/apk-instr.xml',
+            '<(DEPTH)/build/android/gyp/ant.py',
+            '<(DEPTH)/build/android/gyp/util/build_utils.py',
+          ],
+          'outputs': [
+            '<(intermediate_dir)/coverage.em',
+            '<(classes_final_dir)',
+          ],
+          'action': [
+            'python', '<(DEPTH)/build/android/gyp/ant.py',
+            '-DCLASSES_DIR=<(classes_dir)',
+            '-DCLASSES_INSTR_DIR=<(classes_final_dir)',
+            '-DEMMA_COVERAGE_FILE=<(intermediate_dir)/coverage.em',
+            '-DANDROID_SDK_ROOT=<(android_sdk_root)',
+            '-Dbasedir=.',
+            '-buildfile',
+            '<(DEPTH)/build/android/ant/apk-instr.xml',
+          ]
+        },
+      ],
+    }],
   ],
   'actions': [
     {
@@ -252,11 +288,17 @@
     {
       'action_name': 'jar_<(_target_name)',
       'message': 'Creating <(_target_name) jar',
+      'conditions': [
+        ['coverage == 1', {
+          'inputs': [ '<(intermediate_dir)/coverage.em', ]
+        }, {
+          'inputs': [ '<(compile_stamp)' ]
+        }]
+      ],
       '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)',
       ],
       'outputs': [
         '<(jar_path)',