Remove debug output formatting from GlyphPageTreeNode and friends

BUG=412478

Review URL: https://codereview.chromium.org/551373002

git-svn-id: svn://svn.chromium.org/blink/trunk@181673 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Switch shared workers inspection on to the main thread.

BUG=404355

Review URL: https://codereview.chromium.org/534293003

git-svn-id: svn://svn.chromium.org/blink/trunk@181674 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Revert "Don't layout when isSelfPaintingLayer() changes"

This reverts https://src.chromium.org/viewvc/blink?revision=173614&view=revision

Breaks going in and out of compositing mode for layers that are floated. There
is logic that is reading the self painting layer bit when computing the overflow
of elements inside layout and also when computing if floats should paint. My
original patch was generally wrong, so many parts of layout are reading
hasSelfPaintingLayer() inside layout.

BUG=411825

Review URL: https://codereview.chromium.org/556993002

git-svn-id: svn://svn.chromium.org/blink/trunk@181676 bbb929c8-8fbe-4397-9dbb-9b2b20218538