Remove V8RecrusionScope, cleanup call sites.

third_party/WebKit/Source/web/web.gypi

 {
   'variables': {
     'web_files': [
       'AssertMatchingEnums.cpp',
       'AssociatedURLLoader.cpp',
       'AssociatedURLLoader.h',
       'AudioOutputDeviceClientImpl.cpp',
       'AudioOutputDeviceClientImpl.h',
       'ChromeClientImpl.cpp',
       'ChromeClientImpl.h',
@@ skipping 180 matching lines @@
       'WebPepperSocketImpl.h',
       'WebPerformance.cpp',
       'WebPluginContainerImpl.cpp',
       'WebPluginContainerImpl.h',
       'WebPluginDocument.cpp',
       'WebPluginScriptForbiddenScope.cpp',
       'WebRange.cpp',
       'WebRemoteFrameImpl.cpp',
       'WebRemoteFrameImpl.h',
       'WebRuntimeFeatures.cpp',
-      'WebScopedMicrotaskSuppression.cpp',
       'WebScopedUserGesture.cpp',
       'WebScopedWindowFocusAllowedIndicator.cpp',
       'WebScriptController.cpp',
       'WebScriptSource.cpp',
       'WebSearchableFormData.cpp',
       'WebSecurityPolicy.cpp',
       'WebSelectElement.cpp',
       'WebSelection.cpp',
       'WebSelector.cpp',
       'WebSerializedScriptValue.cpp',
@@ skipping 92 matching lines @@
       'tests/sim/SimNetwork.h',
       'tests/sim/SimRequest.cpp',
       'tests/sim/SimRequest.h',
       'tests/sim/SimTest.cpp',
       'tests/sim/SimTest.h',
       'tests/sim/SimWebViewClient.cpp',
       'tests/sim/SimWebViewClient.h',
     ],
   },
 }