Micro cleanup/optimization.

* Added a cache mapping element names to taming classes, which
  bypasses going through both the HTML schema and taming class table
  when taming a node. Barely improves performance according to the
  Chrome profiler.
* In defineElement ctors, don't call isVirtualizedElementName unless
  the result will be used.
* Put simpler conditions first in repair_DEFINE_PROPERTY.
* Remove setOwn and definePropertyAllowOverride in Domado in favor
  of more explicit and specialized forms which do not need to do
  reflection to decide what to do.
* Added missing documentation for virtualized parameter to
  defineElement.

@r5448

[MarkM, 2013-06-13 18:44:50]

ses/* stuff LGTM

[felix8a, 2013-06-13 18:55:16]

lgtm

https://codereview.appspot.com/10234049/diff/1/src/com/google/caja/plugin/dom...
File src/com/google/caja/plugin/domado.js (right):

https://codereview.appspot.com/10234049/diff/1/src/com/google/caja/plugin/dom...
src/com/google/caja/plugin/domado.js:3094:
setToString(TameNamedNodeMap.prototype, cajaVM.def(function() {
any reason this is def instead of constfunc (or innocuous)? a few more below
too.

[kpreid2, 2013-06-13 18:59:12]

* Added a cache mapping element names to taming classes, which
  bypasses going through both the HTML schema and taming class table
  when taming a node. Barely improves performance according to the
  Chrome profiler.
* In defineElement ctors, don't call isVirtualizedElementName unless
  the result will be used.
* Put simpler conditions first in repair_DEFINE_PROPERTY.
* Remove setOwn and definePropertyAllowOverride in Domado in favor
  of more explicit and specialized forms which do not need to do
  reflection to decide what to do.
* Added missing documentation for virtualized parameter to
  defineElement.

[kpreid2, 2013-06-13 19:00:00]

https://codereview.appspot.com/10234049/diff/1/src/com/google/caja/plugin/dom...
File src/com/google/caja/plugin/domado.js (right):

https://codereview.appspot.com/10234049/diff/1/src/com/google/caja/plugin/dom...
src/com/google/caja/plugin/domado.js:3094:
setToString(TameNamedNodeMap.prototype, cajaVM.def(function() {
On 2013/06/13 18:55:17, felix8a wrote:
> any reason this is def instead of constfunc (or innocuous)? a few more below
> too.

Done.