https://bugs.webkit.org/show_bug.cgi?id=71522

Source/JavaScriptCore: 

Reviewed by Gavin Barraclough.
        
Added a construct that looks like SamplingRegion samplingRegion("name").

* JavaScriptCore.exp:
* JavaScriptCore.xcodeproj/project.pbxproj:
* bytecode/SamplingTool.cpp:
(JSC::SamplingRegion::Locker::Locker):
(JSC::SamplingRegion::Locker::~Locker):
(JSC::SamplingRegion::sample):
(JSC::SamplingRegion::dump):
(JSC::SamplingRegion::dumpInternal):
(JSC::SamplingThread::threadStartFunc):
* bytecode/SamplingTool.h:
(JSC::SamplingRegion::SamplingRegion):
(JSC::SamplingRegion::~SamplingRegion):
(JSC::SamplingRegion::exchangeCurrent):
* bytecompiler/BytecodeGenerator.cpp:
(JSC::BytecodeGenerator::generate):
* dfg/DFGDriver.cpp:
(JSC::DFG::compile):
* heap/Heap.cpp:
(JSC::Heap::markRoots):
(JSC::Heap::collect):
* heap/VTableSpectrum.cpp:
(JSC::VTableSpectrum::countVPtr):
(JSC::VTableSpectrum::dump):
* heap/VTableSpectrum.h:
* jsc.cpp:
(main):
(runWithScripts):
* parser/Parser.h:
(JSC::parse):
* runtime/Executable.cpp:
(JSC::EvalExecutable::compileInternal):
(JSC::ProgramExecutable::compileInternal):
(JSC::FunctionExecutable::compileForCallInternal):
(JSC::FunctionExecutable::compileForConstructInternal):
* wtf/Atomics.h:
(WTF::weakCompareAndSwap):
* wtf/Platform.h:
* wtf/Spectrum.h: Added.
(WTF::Spectrum::Spectrum):
(WTF::Spectrum::add):
(WTF::Spectrum::get):
(WTF::Spectrum::begin):
(WTF::Spectrum::end):
(WTF::Spectrum::KeyAndCount::KeyAndCount):
(WTF::Spectrum::KeyAndCount::operator<):
(WTF::Spectrum::buildList):
* wtf/wtf.pri:

Source/JavaScriptGlue: 

Reviewed by Gavin Barraclough.
        
* ForwardingHeaders/wtf/Spectrum.h: Added.

Source/WebCore: 

Reviewed by Gavin Barraclough.

No new tests, since no functionality changed.

* ForwardingHeaders/wtf/Spectrum.h: Added.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@99374 268f45cc-cd09-0410-ab3c-d52691b4dbfc