Fix use-after-free regression in WebSocket Worker code

Pass SyncHelper and WaitableEvent to Peer since Bridge asynchronously kills Peer (which means Peer could outlive Bridge)

BUG=341754
TEST=http/tests/websocket/workers/worker-reload-repeated.html

Review URL: https://codereview.chromium.org/157283003

git-svn-id: svn://svn.chromium.org/blink/trunk@166701 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Fix selected item color in heap snapshots.

R=yurys@chromium.org

Review URL: https://codereview.chromium.org/156743002

git-svn-id: svn://svn.chromium.org/blink/trunk@166702 bbb929c8-8fbe-4397-9dbb-9b2b20218538
CSP 1.1: Remove last bits of 'X-WebKit-CSP'.

We deprecated these prefixed headers in M32. Let's get rid of them entirely.

BUG=335489,307404

Review URL: https://codereview.chromium.org/149953007

git-svn-id: svn://svn.chromium.org/blink/trunk@166703 bbb929c8-8fbe-4397-9dbb-9b2b20218538