Quicken some layout tests doing string concat.

In these tests, a string over 10k characters is assigned to textarea in splitting 
about 10 characters per loop!

In fact, the textarea is not related to test itself.
It seems for a 'debug' purpose at that time.
This files were created in 2009 and I think that we don't need the textarea
 anymore.

BUG=

Review URL: https://codereview.chromium.org/398643005

git-svn-id: svn://svn.chromium.org/blink/trunk@178628 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Always set the container size for a pAR=none image to the intrinsic size

When updating the viewport for an <svg:image> that has preserveAspectRatio
set to 'none' only update the container size from the intrinsic size, and
never the actual viewport (size) as specified by the 'width' and 'height'
attributes. Previously a change to the actual viewport (when pAR=none)
would cause an update to the container size from the actual viewport size,
since the image/container size was previously set to the intrinsic size.
Also simplify the request for the intrinsic size a bit.

BUG=395139

Review URL: https://codereview.chromium.org/403393002

git-svn-id: svn://svn.chromium.org/blink/trunk@178629 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Don't check resourceLoadTiming when fetched via a ServiceWorker in Performance::addResourceTiming().

Currently ServiceWorker doesn't support TimingInfo.
So ASSERT(finalTiming) failes.

BUG=373120

Review URL: https://codereview.chromium.org/396733007

git-svn-id: svn://svn.chromium.org/blink/trunk@178630 bbb929c8-8fbe-4397-9dbb-9b2b20218538