[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..6c4baf9a7b651d5863559c111fcf861506a5fe80 100644
--- a/build/java_apk.gypi
+++ b/build/java_apk.gypi
@@ -87,15 +87,18 @@
     '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',
+    'instr_stamp': '<(intermediate_dir)/instr.stamp',
     'jar_stamp': '<(intermediate_dir)/jar.stamp',
     'obfuscate_stamp': '<(intermediate_dir)/obfuscate.stamp',
     'strip_stamp': '<(intermediate_dir)/strip.stamp',
     'classes_dir': '<(intermediate_dir)/classes',
+    'classes_final_dir': '<(intermediate_dir)/classes_instr',
     'javac_includes': [],
     'jar_excluded_classes': [],
     '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',
@@ -461,20 +464,55 @@
       ],
     },
     {
+      'action_name': 'instr_classes_<(_target_name)',
+      'message': 'Instrumenting <(_target_name) classes',
+      'variables': {
+        'conditions': [
+          ['emma_instrument != 0', {
+            'instr_action': 'instrument_classes',
+            'extra_instr_args': [
+              '--coverage-file=<(intermediate_dir)/coverage.em',
+              '--sources-file=<(intermediate_dir)/emma_sources.txt',
+              '--sources=<(java_in_dir)/src >(additional_src_dirs) >(generated_src_dirs)',
+            ]
+          }, {
+            'instr_action': 'copy',
+            'extra_instr_args': [],
+          }]
+        ]
+      },
+      'inputs': [
+        '<(compile_stamp)',
+        '<(DEPTH)/build/android/gyp/util/build_utils.py',
+        '<(DEPTH)/build/android/gyp/instr.py',
+      ],
+      'outputs': [
+        '<(instr_stamp)',
+      ],
+      'action': [
+        'python', '<(DEPTH)/build/android/gyp/instr.py',
+        '<(instr_action)',
+        '--input-path=<(classes_dir)',
+        '--output-path=<(classes_final_dir)',
+        '--stamp=<(instr_stamp)',
+        '<@(extra_instr_args)',
+      ]
+    },
+    {
       'action_name': 'jar_<(_target_name)',
       'message': 'Creating <(_target_name) jar',
       'inputs': [
+        '<(instr_stamp)',
         '<(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)',
@@ -491,7 +529,7 @@
         '<(DEPTH)/build/android/ant/create-test-jar.js',
         '<(DEPTH)/build/android/gyp/util/build_utils.py',
         '<(DEPTH)/build/android/gyp/ant.py',
-        '<(compile_stamp)',
+        '<(instr_stamp)',
         '>@(proguard_flags_paths)',
       ],
       'outputs': [
@@ -536,10 +574,13 @@
             'input_paths': [ '<(obfuscate_stamp)' ],
             'proguard_enabled_input_path': '<(obfuscated_jar_path)',
           }],
+          ['emma_instrument != 0', {
+            'dex_input_paths': [ '<(emma_device_jar)' ],
+          }],
         ],
-        'input_paths': [ '<(compile_stamp)' ],
+        'input_paths': [ '<(instr_stamp)' ],
         '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 +663,7 @@
         '-DOUT_DIR=<(intermediate_dir)',
         '-DSOURCE_DIR=<(source_dir)',
         '-DUNSIGNED_APK_PATH=<(unsigned_apk_path)',
+        '-DEMMA_INSTRUMENT=<(emma_instrument)',
 
         '-Dbasedir=.',
         '-buildfile',