Improve comments in RenderView::invalidatePaintForRectangle().

Also, Rename Repaint to InvalidatePaint in RenderView.

Review URL: https://codereview.chromium.org/424253003

git-svn-id: svn://svn.chromium.org/blink/trunk@179249 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Have HTMLConstructionSite::createHTMLElement() return an HTMLElement

Have HTMLConstructionSite::createHTMLElement() return an HTMLElement instead
of an Element for clarity.

R=eseidel@chromium.org, adamk@chromium.org

Review URL: https://codereview.chromium.org/425263006

git-svn-id: svn://svn.chromium.org/blink/trunk@179250 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Use tighter typing in editing: EditingStyle

Use tighter typing in editing to increase code readability. This CL focuses
on EditingStyle.

R=leviw@chromium.org

Review URL: https://codereview.chromium.org/423673002

git-svn-id: svn://svn.chromium.org/blink/trunk@179251 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: unhide timeline on tracing and layers panel experiments.

NOTRY=true

Review URL: https://codereview.chromium.org/433563002

git-svn-id: svn://svn.chromium.org/blink/trunk@179252 bbb929c8-8fbe-4397-9dbb-9b2b20218538