Revert "CSS Transforms: Implement perspective"

This reverts https://codereview.chromium.org/211233003

This change appears to be causing crashes on mac debug bots in tests.

See: http://test-results.appspot.com/dashboards/flakiness_dashboard.html#group=%40ToT%20Blink&tests=animations%2Finterpolation%2Fperspective-interpolation.html

Typical crash stack:
STDERR: ASSERTION FAILED: isAllowedToQueryCompositingState()
STDERR: ../../third_party/WebKit/Source/core/rendering/RenderLayer.cpp(3603) : WebCore::CompositedLayerMappingPtr WebCore::RenderLayer::compositedLayerMapping() const
STDERR: 1   0x7d14b1d1 WebCore::RenderLayer::compositedLayerMapping() const
STDERR: 2   0x7d149c5f WebCore::RenderLayer::updateLayerPositions(WebCore::RenderGeometryMap*, unsigned int)
STDERR: 3   0x7d149bdc WebCore::RenderLayer::updateLayerPositions(WebCore::RenderGeometryMap*, unsigned int)
STDERR: 4   0x7d17f057 WebCore::RenderLayerModelObject::styleDidChange(WebCore::StyleDifference, WebCore::RenderStyle const*)
STDERR: 5   0x7d07090f WebCore::RenderBox::styleDidChange(WebCore::StyleDifference, WebCore::RenderStyle const*)
STDERR: 6   0x7cfe533c WebCore::RenderBlock::styleDidChange(WebCore::StyleDifference, WebCore::RenderStyle const*)
STDERR: 7   0x7d03d91c WebCore::RenderBlockFlow::styleDidChange(WebCore::StyleDifference, WebCore::RenderStyle const*)
STDERR: 8   0x7d1cc650 WebCore::RenderObject::setStyle(WTF::PassRefPtr<WebCore::RenderStyle>)
STDERR: 9   0x7c0b1fcd WebCore::Element::recalcOwnStyle(WebCore::StyleRecalcChange)
STDERR: 10  0x7c0b196d WebCore::Element::recalcStyle(WebCore::StyleRecalcChange, WebCore::Text*)
STDERR: 11  0x7c0b2500 WebCore::Element::recalcChildStyle(WebCore::StyleRecalcChange)
STDERR: 12  0x7c0b19bf WebCore::Element::recalcStyle(WebCore::StyleRecalcChange, WebCore::Text*)
STDERR: 13  0x7c0b2500 WebCore::Element::recalcChildStyle(WebCore::StyleRecalcChange)
STDERR: 14  0x7c0b19bf WebCore::Element::recalcStyle(WebCore::StyleRecalcChange, WebCore::Text*)
STDERR: 15  0x7c0b2500 WebCore::Element::recalcChildStyle(WebCore::StyleRecalcChange)
STDERR: 16  0x7c0b19bf WebCore::Element::recalcStyle(WebCore::StyleRecalcChange, WebCore::Text*)
STDERR: 17  0x7c0b2500 WebCore::Element::recalcChildStyle(WebCore::StyleRecalcChange)
STDERR: 18  0x7c0b19bf WebCore::Element::recalcStyle(WebCore::StyleRecalcChange, WebCore::Text*)
STDERR: 19  0x7c011dbf WebCore::Document::updateStyle(WebCore::StyleRecalcChange)
STDERR: 20  0x7c0117c4 WebCore::Document::updateRenderTree(WebCore::StyleRecalcChange)
STDERR: 21  0x7a4f9d5c WebCore::Document::updateRenderTreeIfNeeded()
STDERR: 22  0x7c012372 WebCore::Document::updateRenderTreeForNodeIfNeeded(WebCore::Node*)
STDERR: 23  0x7c75f4aa WebCore::CSSComputedStyleDeclaration::getPropertyCSSValue(WebCore::CSSPropertyID, WebCore::EUpdateLayout) const
STDERR: 24  0x7c75f372 WebCore::CSSComputedStyleDeclaration::getPropertyCSSValue(WebCore::CSSPropertyID) const
STDERR: 25  0x7c75eaf8 WebCore::CSSComputedStyleDeclaration::getPropertyValue(WebCore::CSSPropertyID) const
STDERR: 26  0x7c77b9bb WebCore::CSSComputedStyleDeclaration::getPropertyValue(WTF::String const&)
STDERR: 27  0x7b46252d WebCore::CSSStyleDeclarationV8Internal::getPropertyValueMethod(v8::FunctionCallbackInfo<v8::Value> const&)
STDERR: 28  0x7b4606ea WebCore::CSSStyleDeclarationV8Internal::getPropertyValueMethodCallback(v8::FunctionCallbackInfo<v8::Value> const&)
STDERR: 29  0x78496dc0 v8::internal::FunctionCallbackArguments::Call(void (*)(v8::FunctionCallbackInfo<v8::Value> const&))
STDERR: 30  0x784edac8 v8::internal::Builtin_HandleApiCall(int, v8::internal::Object**, v8::internal::Isolate*)
STDERR: 31  0x3d30a0d6

NOTREECHECKS=true
NOTRY=true
TBR=eseidel,dstockwell
BUG=154772

Review URL: https://codereview.chromium.org/217363003

git-svn-id: svn://svn.chromium.org/blink/trunk@170363 bbb929c8-8fbe-4397-9dbb-9b2b20218538