Remove CSS Regions performance tests

CSS Regions code has been removed in r167275 so these performance tests
do not work anymore.

Review URL: https://codereview.chromium.org/205323003

git-svn-id: svn://svn.chromium.org/blink/trunk@169593 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Oilpan: Prepare to move DatabaseThread and SQLTransactionCoordinator to Oilpan heap.

BUG=347902

Review URL: https://codereview.chromium.org/201083003

git-svn-id: svn://svn.chromium.org/blink/trunk@169594 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Should remove StyleSheetContents from cache even if document is not active.

StyleSheetContents cache works independent of document's active(),
because StyleElement::process() always invokes StyleEngine::createSheet().

So removeSheetFromCache should also remove 'this' from the cache independent of document's active().

BUG=353894
TEST=fast/dom/move-style-element-to-inactive-document-crash.html

Review URL: https://codereview.chromium.org/204423002

git-svn-id: svn://svn.chromium.org/blink/trunk@169595 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Setting HTMLStyleElement should use RecalcStyleDeferred

Theres no reason to synchronously recalc style whenever you change the
media attribute of a <style>.

Review URL: https://codereview.chromium.org/205463002

git-svn-id: svn://svn.chromium.org/blink/trunk@169596 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Rewrite platform headers in public/web/ to public/platform/...

Includes of this style are more consistent with the rest of the project and
easier to verify with DEPS. For consistency, includes in public/web/ of other
headers in public/web/ are rewritten to list the public/web/ portion as well.

BUG=350097

Review URL: https://codereview.chromium.org/189703002

git-svn-id: svn://svn.chromium.org/blink/trunk@169597 bbb929c8-8fbe-4397-9dbb-9b2b20218538