Revert of Web Animations API: Add performance tests to WebKet/PerformanceTests/Animation (https://codereview.chromium.org/239623004/)

Reason for revert:
Broke blink_perf

BUG=364260

Original issue's description:
> Web Animations API: Add performance tests to WebKet/PerformanceTests/Animation
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=171758

TBR=shans@chromium.org,rjwright@chromium.org
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/240213006

git-svn-id: svn://svn.chromium.org/blink/trunk@171812 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove contentStyleType and contentScriptType from SVGSVGElement

These are marked for removal in the changes section:

http://www.w3.org/TR/SVG2/changes.html

Note that Mozilla has already removed these two.

Review URL: https://codereview.chromium.org/233653007

git-svn-id: svn://svn.chromium.org/blink/trunk@171813 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Make Vector<WebCore::NodeEventContext> faster

The Intel VTune Amplifier profile detects 'NodeEventContext' destructor
(and its subsequent calls) to be the biggest hotspot when running
'EventsDispatchingInDeeplyNestedShadowTrees' performance test.

The main reason for it is inefficient Vector<WebCore::NodeEventContext>
(and the applied VectorMover in particular). This patch makes the
Vector<WebCore::NodeEventContext> more efficient via using
SimpleClassVectorTraits for NodeEventContext.

Results are the folowing (linux desktop x64, GCC 4.6.3,
release content_shell build with enabled 'linux_dump_symbols' flag)
before:
avg 6359.329553799463 runs/s
median 6412.644942400308 runs/s
stdev 220.99651799417947 runs/s
min 5429.032965593617 runs/s
max 6449.434918587015 runs/s

after:
avg 8059.328340764995 runs/s
median 8181.982047553853 runs/s
stdev 465.58159603795553 runs/s
min 6800.9409740083 runs/s
max 8483.844241958124 runs/s

The avg performance gain is around 28%

Review URL: https://codereview.chromium.org/239703005

git-svn-id: svn://svn.chromium.org/blink/trunk@171814 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Mark tests needing rebaseline for https://codereview.chromium.org/240483004/

TBR=piman@chromium.org,enne@chromium.org
BUG=363772

Review URL: https://codereview.chromium.org/238443014

git-svn-id: svn://svn.chromium.org/blink/trunk@171815 bbb929c8-8fbe-4397-9dbb-9b2b20218538