tree 21dd4026530eddcf9d9551b1a67c92754c89dc48
parent 4416584802dbda4ade8df7f81af84a73d6887049
author Carl Shapiro <cshapiro@google.com> 1283901541 -0700
committer Carl Shapiro <cshapiro@google.com> 1283904203 -0700

Cherry pick new concurrent gc trigger change from dalvik-dev.

git cherry-pick d370c7d8c5bd4f49274b5d306751c43c7bb44a0b --no-commit
git cherry-pick 562cafca106d36ae910fafa87f3d5f245fe818ae --no-commit
git cherry-pick ab46f94967a76a1c141c1e719d5f2cffe2780a8c --no-commit

Change-Id: Iba35cd3afee5d575b8121f7ab3ef5b45b37f5278