Add override for obfuscate target to support Proguard.

Add override for obfuscate target to support Proguard.

Ant builds do not support Proguard because the default obfuscate target
does not support using custom classpaths for jars.
Add javac.custom.classpath to the obfuscate target.

BUG=149214
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=160917

[shashi, 2012-10-05 22:41:42]

https://chromiumcodereview.appspot.com/11013040/diff/1/build/android/ant/sdk-...
File build/android/ant/sdk-targets.xml (right):

https://chromiumcodereview.appspot.com/11013040/diff/1/build/android/ant/sdk-...
build/android/ant/sdk-targets.xml:207: <path refid="javac.custom.classpath"/>
Only customization is here, I tried overriding project.all.jars.paths but that
does not work. Also I think we may need further customization to proguard once
we enable it so overriding it may be better.

[shashi, 2012-10-08 18:50:37]

https://codereview.chromium.org/11013040/diff/9001/build/android/ant/sdk-targ...
File build/android/ant/sdk-targets.xml (right):

https://codereview.chromium.org/11013040/diff/9001/build/android/ant/sdk-targ...
build/android/ant/sdk-targets.xml:207: <path refid="javac.custom.classpath"/>
Relevant change here.

[cjhopman, 2012-10-09 18:13:53]

lgtm

[nilesh, 2012-10-09 18:30:42]

On 2012/10/09 18:13:53, cjhopman wrote:
> lgtm

Rubberstamp LGTM

[commit-bot: I haz the power, 2012-10-09 18:32:12]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/shashishekhar@chromium.org/11013040/9001

[commit-bot: I haz the power, 2012-10-09 20:53:15]

Change committed as 160917