GitLab

Change constants in GpuMemoryManager to helper functions (and variables).

This is towards (1) automated testing of the GPU memory manager and (2) getting actual vidmem values.

BUG=132994


Review URL: https://chromiumcodereview.appspot.com/10823092

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149149 0039d316-1c4b-4281-b951-d872f2087c98