https://bugs.webkit.org/show_bug.cgi?id=115576

Reviewed by Mark Hahnenberg.

Added OptionRange to Options to allow checking that something is within an option
or not.  The new OptionClass supports range strings in the form of [!]<low>[:<high>].
If only one value is given, then it will be used for both low and high.  A leading
'!' inverts the check.  If no range is given, then checking for a value within a range
will always return true.  Added the option "bytecodeRangeToDFGCompile" that takes an
OptionRange string to select the bytecode range of code blocks to DFG compile.

* dfg/DFGDriver.cpp:
(JSC::DFG::compile): Added new check for bytecode count within bytecodeRangeToDFGCompile
range.
* runtime/Options.cpp:
(JSC::parse): Added overloaded parse() for OptionRange.
(JSC::OptionRange::init): Parse range string and then initialize the range.
(JSC::OptionRange::isInRange): Function used by consumer to check if a value is within
the specified range.
(JSC::Options::dumpOption): Added code to dump OptionRange options.
* runtime/Options.h:
(OptionRange): New class.
(JSC::OptionRange::operator= ): This is really used as a default ctor for use within
the Option static array initialization.
(JSC::OptionRange::rangeString): This is used for debug.  It assumes that the char*
passed into OptionRange::init is valid when this function is called.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@149552 268f45cc-cd09-0410-ab3c-d52691b4dbfc