Move workers' Performance API code to core/timing

Source/core/core.gypi

Index: Source/core/core.gypi
diff --git a/Source/core/core.gypi b/Source/core/core.gypi
index beda7d9909af7ff5b6b69132842f69ef8d383b8e..d018b9f965fff313e5ec23f3d76e6d72d0f5eec0 100644
--- a/Source/core/core.gypi
+++ b/Source/core/core.gypi
@@ -426,6 +426,8 @@
             'timing/PerformanceRenderTiming.idl',
             'timing/PerformanceResourceTiming.idl',
             'timing/PerformanceTiming.idl',
+            'timing/WorkerPerformance.idl',
+            'workers/SharedWorker.idl',
             'workers/Worker.idl',
             'workers/WorkerConsole.idl',
             'workers/WorkerLocation.idl',
@@ -453,7 +455,6 @@
             'html/HTMLVideoElement.idl',
             'inspector/DevToolsHost.idl',
             'workers/DedicatedWorkerGlobalScope.idl',
-            'workers/SharedWorker.idl',
             'workers/SharedWorkerGlobalScope.idl',
             'workers/WorkerGlobalScope.idl',
             'workers/WorkerNavigator.idl',
@@ -496,7 +497,9 @@
             'svg/SVGURIReference.idl',
             'svg/SVGZoomAndPan.idl',
             'timing/ConsoleMemory.idl',
+            'timing/SharedWorkerPerformance.idl',
             'timing/WindowPerformance.idl',
+            'timing/WorkerGlobalScopePerformance.idl',
             'workers/AbstractWorker.idl',
             'xml/DocumentXMLTreeViewer.idl',
             'xml/DocumentXPathEvaluator.idl',
@@ -2026,6 +2029,11 @@
             'timing/PerformanceUserTiming.cpp',
             'timing/PerformanceUserTiming.h',
             'timing/ResourceTimingInfo.h',
+            'timing/SharedWorkerPerformance.cpp',
+            'timing/WorkerGlobalScopePerformance.cpp',
+            'timing/WorkerGlobalScopePerformance.h',
+            'timing/WorkerPerformance.cpp',
+            'timing/WorkerPerformance.h',
             'workers/AbstractWorker.cpp',
             'workers/AbstractWorker.h',
             'workers/DedicatedWorkerGlobalScope.cpp',