Web Inspector: Native Memory Instrumentation: adjust chunk transfer size for better speed.
https://bugs.webkit.org/show_bug.cgi?id=109263

Reviewed by Yury Semikhatsky.

The chunk size is changed from 100 to 10000.
addString counts only first 256 symbols of the string.o

* inspector/HeapGraphSerializer.cpp:
(WebCore::HeapGraphSerializer::pushUpdateIfNeeded):
(WebCore::HeapGraphSerializer::addString):
* inspector/front-end/NativeMemorySnapshotView.js:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@142241 268f45cc-cd09-0410-ab3c-d52691b4dbfc