https://bugs.webkit.org/show_bug.cgi?id=115913

Reviewed by Andreas Kling.

MemoryUsageSupport was just used by a single call site in InspectorTimelineAgent,
and the function called always returns zero on all platforms! Remove it.

* CMakeLists.txt:
* GNUmakefile.list.am:
* Target.pri:
* WebCore.vcproj/WebCore.vcproj:
* WebCore.vcxproj/WebCore.vcxproj:
* WebCore.vcxproj/WebCore.vcxproj.filters:
* WebCore.xcodeproj/project.pbxproj:
* inspector/InspectorMemoryAgent.cpp:
* inspector/InspectorTimelineAgent.cpp:
(WebCore):
(WebCore::InspectorTimelineAgent::setNativeHeapStatistics):
* platform/MemoryUsageSupport.cpp: Removed.
* platform/MemoryUsageSupport.h: Removed.
* platform/qt/MemoryUsageSupportQt.cpp: Removed.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@149882 268f45cc-cd09-0410-ab3c-d52691b4dbfc