https://bugs.webkit.org/show_bug.cgi?id=29260

Reviewed by David Kilzer.

JavaScriptCore:

* wtf/Platform.h:

WebCore:

No new tests. (No change in default behavior.)

* DerivedSources.make: Use new WebCore.Inspector.exp file if ENABLE_DRAG_SUPPORT.
* WebCore.base.exp: Move Inspector only exports to WebCore.Inspector.exp.
* WebCore.xcodeproj/project.pbxproj: Add WebCore.Inspector.exp.
* bindings/js/JSDOMWindowBase.cpp: Use ENABLE(INSPECTOR) where applicable.
(WebCore::JSDOMWindowBase::supportsProfiling):
* bindings/js/JSInspectedObjectWrapper.cpp: Wrap entire file in ENABLE(INSPECTOR).
* bindings/js/JSInspectorBackendCustom.cpp: Ditto.
* bindings/js/JSInspectorCallbackWrapper.cpp: Ditto.
* bindings/js/ScriptObject.cpp: Use ENABLE(INSPECTOR) where applicable.
* bindings/js/ScriptObject.h: Ditto.
* bindings/js/ScriptObjectQuarantine.cpp: Wrap entire file in ENABLE(INSPECTOR).
* dom/Document.cpp: Use ENABLE(INSPECTOR) where applicable.
(WebCore::Document::recalcStyle):
(WebCore::Document...