Add Web Resources usage to chrome://tracing.

third_party/WebKit/Source/core/core.gypi

 {
     'includes': [
         'core_generated.gypi',
     ],
     'variables': {
         # Files for which bindings (.cpp and .h files) will be generated
         'core_idl_files': [
             'animation/KeyframeEffect.idl',
             'animation/EffectModel.idl',
             'animation/AnimationEffectReadOnly.idl',
@@ skipping 1495 matching lines @@
             'fetch/ResourceLoaderSet.h',
             'fetch/ResourcePtr.cpp',
             'fetch/ResourcePtr.h',
             'fetch/ScriptResource.cpp',
             'fetch/ScriptResource.h',
             'fetch/SubstituteData.h',
             'fetch/TextResource.cpp',
             'fetch/TextResource.h',
             'fetch/UniqueIdentifier.cpp',
             'fetch/UniqueIdentifier.h',
+            'fetch/WebCacheMemoryDumpProvider.cpp',
+            'fetch/WebCacheMemoryDumpProvider.h',
             'fetch/XSLStyleSheetResource.cpp',
             'fetch/XSLStyleSheetResource.h',
             'fileapi/Blob.cpp',
             'fileapi/Blob.h',
             'fileapi/File.cpp',
             'fileapi/File.h',
             'fileapi/FileCallback.h',
             'fileapi/FileError.cpp',
             'fileapi/FileError.h',
             'fileapi/FileList.cpp',
@@ skipping 2397 matching lines @@
             'style/SVGComputedStyleTest.cpp',
             'svg/SVGPathParserTest.cpp',
             'svg/UnsafeSVGAttributeSanitizationTest.cpp',
             'testing/PrivateScriptTestTest.cpp',
             'timing/MemoryInfoTest.cpp',
             'workers/WorkerThreadTest.cpp',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }