[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 1635c71da40db66cfee1a1737cc9089057ec378c..0e03c34a5fe71f5315da729764d0e7d6a12c73d7 100644
--- a/build/java.gypi
+++ b/build/java.gypi
@@ -55,7 +55,9 @@
     'additional_src_dirs': [],
     'javac_includes': [],
     'jar_name': '<(_target_name).jar',
-    'jar_path': '<(PRODUCT_DIR)/lib.java/<(jar_name)',
+    'jar_dir': '<(PRODUCT_DIR)/lib.java',
+    'jar_path': '<(intermediate_dir)/<(jar_name)',
+    'jar_final_path': '<(jar_dir)/<(jar_name)',
     'jar_excluded_classes': [ '*/R.class', '*/R##*.class' ],
     'additional_input_paths': [],
     'dex_path': '<(PRODUCT_DIR)/lib.java/<(_target_name).dex.jar',
@@ -75,7 +77,7 @@
   # jar path to the classpath of dependent java targets.
   'all_dependent_settings': {
     'variables': {
-      'input_jars_paths': ['<(jar_path)'],
+      'input_jars_paths': ['<(jar_final_path)'],
       'library_dexed_jars_paths': ['<(dex_path)'],
     },
   },
@@ -276,21 +278,55 @@
       ]
     },
     {
+      'action_name': 'instr_jar_<(_target_name)',
+      'message': 'Instrumenting <(_target_name) jar',
+      'variables': {
+        'conditions': [
+          ['emma_instrument != 0', {
+            'instr_action': 'instrument_jar',
+            'extra_instr_args': [
+              '--intermediate-dir=<(intermediate_dir)',
+              '--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': [
+        '<(jar_path)',
+        '<(DEPTH)/build/android/gyp/instr.py',
+      ],
+      'outputs': [
+        '<(jar_final_path)',
+      ],
+      'action': [
+        'python', '<(DEPTH)/build/android/gyp/instr.py',
+        '<(instr_action)',
+        '--input-path=<(jar_path)',
+        '--output-path=<(jar_dir)',
+        '<@(extra_instr_args)',
+      ]
+    },
+    {
       'action_name': 'jar_toc_<(_target_name)',
       'message': 'Creating <(_target_name) jar.TOC',
       'inputs': [
         '<(DEPTH)/build/android/gyp/util/build_utils.py',
         '<(DEPTH)/build/android/gyp/util/md5_check.py',
         '<(DEPTH)/build/android/gyp/jar_toc.py',
-        '<(jar_path)',
+        '<(jar_final_path)',
       ],
       'outputs': [
-        '<(jar_path).TOC',
+        '<(jar_final_path).TOC',
       ],
       'action': [
         'python', '<(DEPTH)/build/android/gyp/jar_toc.py',
-        '--jar-path=<(jar_path)',
-        '--toc-path=<(jar_path).TOC',
+        '--jar-path=<(jar_final_path)',
+        '--toc-path=<(jar_final_path).TOC',
 
         # TODO(newt): remove this once http://crbug.com/177552 is fixed in ninja.
         '--ignore=>!(echo \'>(_inputs)\' | md5sum)',
@@ -299,7 +335,12 @@
     {
       'action_name': 'dex_<(_target_name)',
       'variables': {
-        'dex_input_paths': [ '<(jar_path)' ],
+        'conditions': [
+          ['emma_instrument != 0', {
+            'dex_no_locals': [ '--no-locals' ],
+          }],
+        ],
+        'dex_input_paths': [ '<(jar_final_path)' ],
         'output_path': '<(dex_path)',
       },
       'includes': [ 'android/dex_action.gypi' ],