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

build/java_apk.gypi

Index: build/java_apk.gypi
diff --git a/build/java_apk.gypi b/build/java_apk.gypi
index e388690f767a9941d92b944f4d09ffba3ce71ac9..8b8b7fde33d22fb0170eac959b8a341c9081b1b4 100644
--- a/build/java_apk.gypi
+++ b/build/java_apk.gypi
@@ -96,6 +96,7 @@
     'jar_path': '<(PRODUCT_DIR)/lib.java/<(jar_name)',
     'obfuscated_jar_path': '<(intermediate_dir)/obfuscated.jar',
     'dex_path': '<(intermediate_dir)/classes.dex',
+    'emma_device_jar': '<(android_sdk_root)/tools/lib/emma_device.jar',
     'android_manifest_path%': '<(java_in_dir)/AndroidManifest.xml',
     'push_stamp': '<(intermediate_dir)/push.stamp',
     'link_stamp': '<(intermediate_dir)/link.stamp',
@@ -130,6 +131,13 @@
     'native_lib_target%': '',
     'apk_package_native_libs_dir': '<(apk_package_native_libs_dir)',
     'unsigned_standalone_apk_path': '<(unsigned_standalone_apk_path)',
+    'conditions': [
+      ['coverage == 1', {
+        'classes_final_dir': '<(intermediate_dir)/classes_instr',
+      }, {
+        'classes_final_dir': '<(intermediate_dir)/classes',
+      }]
+    ]
   },
   # Pass the jar path to the apk's "fake" jar target.  This would be better as
   # direct_dependent_settings, but a variable set by a direct_dependent_settings
@@ -372,6 +380,34 @@
         },
       ],
     }],
+    ['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': [
     {
@@ -463,18 +499,22 @@
     {
       'action_name': 'jar_<(_target_name)',
       'message': 'Creating <(_target_name) jar',
+      'conditions': [
+        ['coverage == 1', {
+          'inputs': [ '<(intermediate_dir)/coverage.em', ]
+        }]
+      ],
       '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_stamp)',
       ],
       'action': [
         'python', '<(DEPTH)/build/android/gyp/jar.py',
-        '--classes-dir=<(classes_dir)',
+        '--classes-dir=<(classes_final_dir)',
         '--jar-path=<(jar_path)',
         '--excluded-classes=<(jar_excluded_classes)',
         '--stamp=<(jar_stamp)',
@@ -536,10 +576,13 @@
             'input_paths': [ '<(obfuscate_stamp)' ],
             'proguard_enabled_input_path': '<(obfuscated_jar_path)',
           }],
+          ['coverage == 1', {
+            'dex_input_paths': [ '<(emma_device_jar)' ],
+          }],
         ],
-        'input_paths': [ '<(compile_stamp)' ],
+        'input_paths': [ '<(compile_stamp)', '<(classes_final_dir)' ],
         'dex_input_paths': [ '>@(library_dexed_jars_paths)' ],
-        'dex_generated_input_dirs': [ '<(classes_dir)' ],
+        'dex_generated_input_dirs': [ '<(classes_final_dir)' ],
         'output_path': '<(dex_path)',
       },
       'includes': [ 'android/dex_action.gypi' ],
@@ -622,6 +665,7 @@
         '-DOUT_DIR=<(intermediate_dir)',
         '-DSOURCE_DIR=<(source_dir)',
         '-DUNSIGNED_APK_PATH=<(unsigned_apk_path)',
+        '-DCOVERAGE=<(coverage)',
 
         '-Dbasedir=.',
         '-buildfile',