DevTools: CPUProfile: child items should have the same sort order as parents.

Top level items are sorted in the cu profiler but
if the user expand an item then it will see the unsorted list of child items.
It was a bug in the code, so the insert procedure wasn't able to get the comparator for sort.

Actually we use only one sort order for the entire grid.

BUG=none
R=yurys@chromium.org

Review URL: https://codereview.chromium.org/27064003

git-svn-id: svn://svn.chromium.org/blink/trunk@159572 bbb929c8-8fbe-4397-9dbb-9b2b20218538
HeapProfiler: fix regression in Performance tests suit.

_updateTransferProgress was moved to a separate transferHandler class.

BUG=none
R=yurys@chromium.org

Review URL: https://codereview.chromium.org/26568003

git-svn-id: svn://svn.chromium.org/blink/trunk@159573 bbb929c8-8fbe-4397-9dbb-9b2b20218538