WebAudio: Simplify ScriptProcessorNode by CrossThreadTask.

CrossThreadTask automtically protects a passed pointer. We can remove
m_keepAliveWhileEventDispatching.

BUG=392788

Review URL: https://codereview.chromium.org/396893003

git-svn-id: svn://svn.chromium.org/blink/trunk@178254 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Revert of Reland of [Blink] XMLTreeViewer should load resources from blink_resources.grd instead of relying upon xxd.py… (https://codereview.chromium.org/393213002/)

Reason for revert:
I mistakenly thought a clobber fixed the bot. It was actually the revert. The bot is failing again after the reland.

Original patch: https://codereview.chromium.org/394003002/
Revert: https://codereview.chromium.org/397893002/
Reland: https://codereview.chromium.org/393213002

TBR=abarth@chromium.org,vivekg@chromium.org,vivek.vg@samsung.com
NOTREECHECKS=true
NOTRY=true
BUG=312586,394239

Review URL: https://codereview.chromium.org/392213002

git-svn-id: svn://svn.chromium.org/blink/trunk@178255 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: unflake network-timing test.

PHP usleep has precision problems on Windows.

BUG=394206

Review URL: https://codereview.chromium.org/394143002

git-svn-id: svn://svn.chromium.org/blink/trunk@178256 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Simple clean-up of PrivateScriptRunner.cpp

- Use WTF_LOG_ERROR instead of FATAL (because FATAL crashes immediately and we cannot get subsequent error messages).
- Rename installClass() to installClassIfNeeded().
- Add a HandleScope to installClassIfNeeded().

BUG=341031

Review URL: https://codereview.chromium.org/393243002

git-svn-id: svn://svn.chromium.org/blink/trunk@178257 bbb929c8-8fbe-4397-9dbb-9b2b20218538