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

chrome/chrome.gyp

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 {
   'variables': {
     'chromium_code': 1,
 
     # Define the common dependencies that contain all the actual
     # Chromium functionality.  This list gets pulled in below by
     # the link of the actual chrome (or chromium) executable on
@@ skipping 1077 matching lines @@
           ],
           'variables': {
             'java_in_dir': '../chrome/android/java',
             'has_java_resources': 1,
             'R_package': 'org.chromium.chrome',
             'R_package_relpath': 'org/chromium/chrome',
             'java_strings_grd': 'android_chrome_strings.grd',
             # Include xml string files generated from generated_resources.grd
             'res_extra_dirs': ['<(SHARED_INTERMEDIATE_DIR)/chrome/java/res'],
             'res_extra_files': ['<!@pymod_do_main(grit_info <@(grit_defines) --outputs "<(SHARED_INTERMEDIATE_DIR)/chrome" app/generated_resources.grd)'],
+            'emma_should_instrument': 1,
           },
           'includes': [
             '../build/java.gypi',
           ],
         },
       ], # 'targets'
       'includes': [
         'chrome_android.gypi',
       ]}, # 'includes'
     ],  # OS=="android"
@@ skipping 91 matching lines @@
               'sources': [
                 'service/cloud_print/print_system_cups.cc',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }