Merge WTF::initializeMainThread into WTF::initialize

third_party/WebKit/Source/wtf/WTF.h

Index: third_party/WebKit/Source/wtf/WTF.h
diff --git a/third_party/WebKit/Source/wtf/WTF.h b/third_party/WebKit/Source/wtf/WTF.h
index 0a542b2b24433b20b5e3ca76736b3d2c03125108..6e49dc239221458e2fbcbd5316ddddd33eb1b3d0 100644
--- a/third_party/WebKit/Source/wtf/WTF.h
+++ b/third_party/WebKit/Source/wtf/WTF.h
@@ -36,11 +36,20 @@
 
 namespace WTF {
 
+typedef void MainThreadFunction(void*);
+
 // This function must be called exactly once from the main thread before using anything else in WTF.
-WTF_EXPORT void initialize();
+WTF_EXPORT void initialize(void (*)(MainThreadFunction, void*));
 WTF_EXPORT void shutdown();
 WTF_EXPORT bool isShutdown();
+WTF_EXPORT bool isMainThread();
+
+namespace internal {
+void callOnMainThread(MainThreadFunction*, void* context);
+} // namespace internal
 
 } // namespace WTF
 
+using WTF::isMainThread;
+
 #endif // WTF_h