DevTools: RequestTiming: extract range calculation to make it reusable.

This patch is required for https://codereview.chromium.org/750953002/

BUG=436009

Review URL: https://codereview.chromium.org/761383002

git-svn-id: svn://svn.chromium.org/blink/trunk@186221 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Move CSS rules from inspectorStyle.css into more specific stylesheets

R=pfeldman

Review URL: https://codereview.chromium.org/768593002

git-svn-id: svn://svn.chromium.org/blink/trunk@186223 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Prefer nextSibling to previousSibling when moving treeElement selection after element removal.

R=pfeldman
NOTRY=true

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=186190

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

git-svn-id: svn://svn.chromium.org/blink/trunk@186224 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: tabbed pane -> shadow

BUG=
R=apavlov@chromium.org

Review URL: https://codereview.chromium.org/767633002

git-svn-id: svn://svn.chromium.org/blink/trunk@186225 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Simplify node removal code, avoid manual tree outline handling.

R=pfeldman
NOTRY=true

Review URL: https://codereview.chromium.org/766963002

git-svn-id: svn://svn.chromium.org/blink/trunk@186226 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: beautify debugger toolbar, fix debugger sidebar resize widget alignment.

NOTRY=true

Review URL: https://codereview.chromium.org/772433003

git-svn-id: svn://svn.chromium.org/blink/trunk@186227 bbb929c8-8fbe-4397-9dbb-9b2b20218538