Move more standalone files from web/ to core/exported/.

third_party/WebKit/Source/core/exported/BUILD.gn

Index: third_party/WebKit/Source/core/exported/BUILD.gn
diff --git a/third_party/WebKit/Source/core/exported/BUILD.gn b/third_party/WebKit/Source/core/exported/BUILD.gn
index 088f61d2ba1e592606bb7001ee920c82c5f59ece..fdc5c0ee6569edafc14669897b7de74f7c7ea14c 100644
--- a/third_party/WebKit/Source/core/exported/BUILD.gn
+++ b/third_party/WebKit/Source/core/exported/BUILD.gn
@@ -30,17 +30,22 @@ blink_core_sources("exported") {
     "WebInputMethodControllerImpl.cpp",
     "WebInputMethodControllerImpl.h",
     "WebMemoryStatistics.cpp",
+    "WebPageImportanceSignals.cpp",
     "WebPerformance.cpp",
     "WebPluginContainerBase.cpp",
     "WebPluginContainerBase.h",
+    "WebPluginScriptForbiddenScope.cpp",
     "WebRange.cpp",
     "WebRenderTheme.cpp",
+    "WebScopedUserGesture.cpp",
     "WebScriptController.cpp",
     "WebScriptSource.cpp",
     "WebSecurityPolicy.cpp",
     "WebSelection.cpp",
     "WebSelector.cpp",
     "WebSerializedScriptValue.cpp",
+    "WebUserGestureIndicator.cpp",
+    "WebUserGestureToken.cpp",
     "WebViewBase.h",
   ]