https://bugs.webkit.org/show_bug.cgi?id=120143

Reviewed by Gavin Barraclough.

Source/JavaScriptCore:

Include zlib in LD_FLAGS and make UnlinkedCodeBlock make use of CompressibleVector.  This saves ~200k on google maps.

* Configurations/JavaScriptCore.xcconfig:
* bytecode/UnlinkedCodeBlock.cpp:
(JSC::UnlinkedCodeBlock::expressionRangeForBytecodeOffset):
(JSC::UnlinkedCodeBlock::addExpressionInfo):
* bytecode/UnlinkedCodeBlock.h:

Source/WTF:

Adds a set of utility functions to wrap the use of zlib over a generic
type or a Vector<> as well as adding CompressibleVector that wraps
either a Vector<> or compressed data.

* GNUmakefile.list.am:
* WTF.pro:
* WTF.vcxproj/WTF.vcxproj:
* WTF.xcodeproj/project.pbxproj:
* wtf/CMakeLists.txt:
* wtf/CheckedArithmetic.h:
* wtf/Compression.cpp: Added.
(WTF::zAlloc):
(WTF::zFree):
(WTF::GenericCompressedData::create):
(WTF::GenericCompressedData::decompress):
* wtf/Compression.h: Added.
(WTF::GenericCompressedData::compressedSize):
(WTF::GenericCompressedData::originalSize):
(WTF::GenericCompressedData::GenericCompressedData):
(WTF::CompressedVector::create):
(WTF::CompressedVector::decompress):
(WTF::CompressedVector::size):
(WTF::CompressibleVector::CompressibleVector):
(WTF::CompressibleVector::shrinkToFit):
(WTF::CompressibleVector::size):
(WTF::CompressibleVector::operator[]):
(WTF::CompressibleVector::at):
(WTF::CompressibleVector::begin):
(WTF::CompressibleVector::end):
(WTF::CompressibleVector::data):
(WTF::CompressibleVector::decompressIfNecessary):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@154498 268f45cc-cd09-0410-ab3c-d52691b4dbfc