Fix a memory leak in SkGPipeCanvas.

In cross process mode (currently unused but tested on the bots),
SkGPipeCanvas has a tangle of circular references, which prevents
it from being deleted. Break the chain of references.

R=junov@chromium.org

Review URL: https://codereview.chromium.org/69633003

git-svn-id: http://skia.googlecode.com/svn/trunk@12237 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed