Adding a simple class for dumping the contents of a cache. Use this new class in dump_cache.

Reverted: 170075
Relanded: 170024
Reverted: 169769
Initially landed: 169704

TBR=rvargas@chromium.org

Review URL: https://codereview.chromium.org/11299239

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@170201 0039d316-1c4b-4281-b951-d872f2087c98
10 files changed