Suspend setTimeout callbacks while dedicated worker execution is paused

WorkerRunLoop::run shouldn't call SharedTimer::fire when processing debugger tasks.

BUG=377926

Review URL: https://codereview.chromium.org/298383002

git-svn-id: svn://svn.chromium.org/blink/trunk@175566 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Show DragImage when the dragged element or its parent has transform

The DragEvent was ignoring the trasnform for the drag point, causing
the dragimage to be drawn at an incorrect location on the canvas. The
patch corrects this.

BUG=322201

Review URL: https://codereview.chromium.org/286903011

git-svn-id: svn://svn.chromium.org/blink/trunk@175567 bbb929c8-8fbe-4397-9dbb-9b2b20218538