All worker threads should be joined before main thread's V8 isolate is destroyed

third_party/WebKit/Source/web/WebKit.cpp

Index: third_party/WebKit/Source/web/WebKit.cpp
diff --git a/third_party/WebKit/Source/web/WebKit.cpp b/third_party/WebKit/Source/web/WebKit.cpp
index f0ac13e62a2b6599a8aee2b4310dc3223c05ec14..37c18d35ddbbb51b72fead7ed63f32202c923a0d 100644
--- a/third_party/WebKit/Source/web/WebKit.cpp
+++ b/third_party/WebKit/Source/web/WebKit.cpp
@@ -81,10 +81,10 @@ void initialize(Platform* platform)
 {
     Platform::initialize(platform);
 
-    modulesInitializer().initialize();
-
     V8Initializer::initializeMainThread();
 
+    modulesInitializer().initialize();
+
     // currentThread is null if we are running on a thread without a message loop.
     if (WebThread* currentThread = platform->currentThread()) {
         DCHECK(!s_endOfTaskRunner);
@@ -106,10 +106,10 @@ void shutdown()
         s_endOfTaskRunner = nullptr;
     }
 
-    V8Initializer::shutdownMainThread();
-
     modulesInitializer().shutdown();
 
+    V8Initializer::shutdownMainThread();
+
     Platform::shutdown();
 }