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

build/common.gypi

 # 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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 888 matching lines @@
     # The default value for mac_strip in target_defaults. This cannot be
     # set there, per the comment about variable% in a target_defaults.
     'mac_strip_release%': 1,
 
     # Set to 1 to enable code coverage.  In addition to build changes
     # (e.g. extra CFLAGS), also creates a new target in the src/chrome
     # project file called "coverage".
     # Currently ignored on Windows.
     'coverage%': 0,
 
+    # Set to '<(coverage)' by individual targets which should be instrumented
+    # when coverage is enabled.
+    'emma_instrument%': 0,

[cjhopman, 2013/08/09 18:54:37]

If this is set by individual targets (i.e. not configurable globally), set the
default in the .gypi files for the targets, not here.

[gkanwar1, 2013/08/09 23:32:53]

This is only set to 1 by targets we want to instrument, and left alone by other
targets (there's a lot of targets that we don't want to instrument, so I feel
like a whitelist works best here). Is there a better way to do this than setting
a global default?

[cjhopman, 2013/08/10 00:11:47]

You can set the default in the .gypi files that use the variable (i.e.
build/java.gypi and build/java_apk.gypi). The target itself can still override
the default in the included .gypi. That is, you can move this line into those
gypi files and there is no need to change any of the targets.

[gkanwar1, 2013/08/12 18:19:10]

Ah, got it. Done.

+
     # Set to 1 to force Visual C++ to use legacy debug information format /Z7.
     # This is useful for parallel compilation tools which can't support /Zi.
     # Only used on Windows.
     'win_z7%' : 0,
 
     # Although base/allocator lets you select a heap library via an
     # environment variable, the libcmt shim it uses sometimes gets in
     # the way.  To disable it entirely, and switch to normal msvcrt, do e.g.
     #  'win_use_allocator_shim': 0,
     #  'win_release_RuntimeLibrary': 2
@@ skipping 3785 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }