Implement Promise.prototype.then and Promise.prototype.catch

We are implementing DOM/Promises.
This CL implements Promise.prototype.then and Promise.prototype.catch.
All methods are marked as Custom and there are many boilerplate. we will fix them in a future CL.

R=abarth, haraken
BUG=243345

Review URL: https://chromiumcodereview.appspot.com/18113004

git-svn-id: svn://svn.chromium.org/blink/trunk@153560 bbb929c8-8fbe-4397-9dbb-9b2b20218538
[DevTools] NetworkPanel: Highlight row with current search result.

1) When search jumps to next result - flash row with result
2) Turn flash animation to be yellow (that is common for other panels)
3) Cleanup row highlight alongside other highlights.

Review URL: https://chromiumcodereview.appspot.com/18325014

git-svn-id: svn://svn.chromium.org/blink/trunk@153561 bbb929c8-8fbe-4397-9dbb-9b2b20218538