Change RenderFrameSet::computeEdgeInfo to use m_rows/m_cols directly

Use the m_rows and m_cols fields directly instead of going through frameSet().

BUG=196575
TEST=fast/frames/invalid-frameset-compute-edge.html
Review URL: https://codereview.chromium.org/13652002

git-svn-id: svn://svn.chromium.org/blink/trunk@147524 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove DEPS file

Chromium-in-Blink working copies are no longer supported.

R=dglazkov

Review URL: https://codereview.chromium.org/13647010

git-svn-id: svn://svn.chromium.org/blink/trunk@147525 bbb929c8-8fbe-4397-9dbb-9b2b20218538