Make Inspector aware of RemoteFrames in FrameTree

We will soon make FrameTree operate on the Frame base class, which can
be instantiated as either LocalFrame or RemoteFrame. This patch modifies
the call sites in the Inspector that will be affected by this change.

BUG=346764
TBR=pfeldman@chromium.org

Review URL: https://codereview.chromium.org/301983003

git-svn-id: svn://svn.chromium.org/blink/trunk@175303 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Update FlakyTests to match current flakiness dashboard results

Automatically generated using:
webkit-patch update-flaky-tests

R=mvanouwerkerk@chromium.org,jchaffraix@chromium.org
BUG=

Review URL: https://codereview.chromium.org/308773009

git-svn-id: svn://svn.chromium.org/blink/trunk@175304 bbb929c8-8fbe-4397-9dbb-9b2b20218538