Don't notify back to the RenderViewImpl that an inspector setting changed.

This makes no sense, since the only way for them to have changed is
for the RenderViewImpl to have set it in the first place. This can also
cause an infinite loop of updating back and forth.

BUG=398751

Review URL: https://codereview.chromium.org/435663002

git-svn-id: svn://svn.chromium.org/blink/trunk@179333 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Fix failure of search in elements after empty results

BUG=

Review URL: https://codereview.chromium.org/432013003

git-svn-id: svn://svn.chromium.org/blink/trunk@179334 bbb929c8-8fbe-4397-9dbb-9b2b20218538