Bug 824217 - Remove the mode argument from the PIERCE macro to eliminate all but one use of JSRESOLVE_ASSIGNING from jswrapper.cpp.  r=bholley

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extra : rebase_source : 107e4a30956092daf38887cd4b329a6f3711f025
Bug 824217 - Make ChromeObjectWrapper::getPropertyDescriptor not pretend no descriptor exists when the property exists along the prototype chain, when the property is being resolved just before an assignment.  r=bholley
Whitespace tab-killing patrol.  No bug, r=sparky