DevTools: Prefer nextSibling to previousSibling when moving treeElement selection after element removal.

R=pfeldman
NOTRY=true

Review URL: https://codereview.chromium.org/764893002

git-svn-id: svn://svn.chromium.org/blink/trunk@186190 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: move SourceFrame.addMessage to ResourceSourceFrame

The method is used only by ResourceSourceFrame.

R=vsevik

Review URL: https://codereview.chromium.org/768813002

git-svn-id: svn://svn.chromium.org/blink/trunk@186192 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Get rid of fullRefresh children update in ElementsTreeOutline.


R=pfeldman

Review URL: https://codereview.chromium.org/763243003

git-svn-id: svn://svn.chromium.org/blink/trunk@186193 bbb929c8-8fbe-4397-9dbb-9b2b20218538