Move HTML and XML parser benchmarks into PerformanceTests/Parser

Move HTML and XML parser benchmarks into PerformanceTests/Parser
https://bugs.webkit.org/show_bug.cgi?id=51772

Rubber-stamped by Eric Seidel.

Actually move the directory.

* PerformanceTests/Parser: Copied from WebCore/benchmarks/parser.

PerformanceTests/Parser:

Add a ChangeLog for tracking changes to the Parser PerformanceTest.

* ChangeLog: Added.

WebCore:

Remove the benchmarks folder now that it's empty.  Future benchmarks
should go in the PerformanceTests directory.

* benchmarks: Removed.
* benchmarks/parser: Removed.
* benchmarks/parser/html-parser.html: Removed.
* benchmarks/parser/resources: Removed.
* benchmarks/parser/resources/html5.html: Removed.
* benchmarks/parser/resources/runner.js: Removed.
* benchmarks/parser/xml-parser.html: Removed.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@74825 268f45cc-cd09-0410-ab3c-d52691b4dbfc