DevTools: Make SearchableView a web component

R=pfeldman

Review URL: https://codereview.chromium.org/732303003

git-svn-id: svn://svn.chromium.org/blink/trunk@185533 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: NetworkPanel: use base time only from document requests.

Summary bar shows DCL relative to start of last main page document load. So, non-document requests should be ignored when "base time" is calculated.

BUG=433371

Review URL: https://codereview.chromium.org/717903005

git-svn-id: svn://svn.chromium.org/blink/trunk@185535 bbb929c8-8fbe-4397-9dbb-9b2b20218538
[DevTools] rename higilightObjectBySnapshotObjectId into revealObjectBySnapshotObjectId

and do select for the node instead of highlight.

BUG=

Review URL: https://codereview.chromium.org/736673003

git-svn-id: svn://svn.chromium.org/blink/trunk@185536 bbb929c8-8fbe-4397-9dbb-9b2b20218538