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

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 72e9ecb7de02588a293fdd8067dd9c2eaf85639c..c789167a19eef1f86a345f0ec14c1677d498ba3b 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -906,6 +906,10 @@
     # 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.