Remove TextTrackCueBox

It is only used by the VTT code, so keep only VTTCueBox.

BUG=270340

Review URL: https://codereview.chromium.org/102073002

git-svn-id: svn://svn.chromium.org/blink/trunk@163149 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Fix inspector-protocol/heap-profiler/heap-objects-tracking.html crash in debug mode

I added reportProgress option which allows us to mute snapshot progress update events in the protocol test and avoid renderer crash. In all other cases this option should be true. When the protocol test run in their own process we will deprecated and remove this option.

BUG=325209

Review URL: https://codereview.chromium.org/102173002

git-svn-id: svn://svn.chromium.org/blink/trunk@163150 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Allow resource loads inside page unload events

https://src.chromium.org/viewvc/blink?revision=154852&view=revision appears
to have inadvertently caused ResourceFetcher::shouldLoadNewResource() to return
false inside of unload events. This is because activeDocumentLoader() has
switched to the provisional document loader, but the request is coming from
the committed document loader.

Test written by sigbjornf@opera.com

BUG=321241
TEST=http/tests/xmlhttprequest/xmlhttprequest-unload-sync.html

Review URL: https://codereview.chromium.org/102353004

git-svn-id: svn://svn.chromium.org/blink/trunk@163151 bbb929c8-8fbe-4397-9dbb-9b2b20218538