Additional context creation tracing

third_party/WebKit/Source/web/WebLocalFrameImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 1503 matching lines @@
     WebTreeScopeType scope = frame()->document() == ownerElement->treeScope()
         ? WebTreeScopeType::Document
         : WebTreeScopeType::Shadow;
     WebFrameOwnerProperties ownerProperties(ownerElement->scrollingMode(), ownerElement->marginWidth(), ownerElement->marginHeight(), ownerElement->allowFullscreen(), ownerElement->delegatedPermissions());
     // FIXME: Using subResourceAttributeName as fallback is not a perfect
     // solution. subResourceAttributeName returns just one attribute name. The
     // element might not have the attribute, and there might be other attributes
     // which can identify the element.
     AtomicString uniqueName = frame()->tree().calculateUniqueNameForNewChildFrame(
         name, ownerElement->getAttribute(ownerElement->subResourceAttributeName()));
-    WebLocalFrameImpl* webframeChild = toWebLocalFrameImpl(m_client->createChildFrame(this, scope, name, uniqueName, static_cast<WebSandboxFlags>(ownerElement->getSandboxFlags()), ownerProperties));
+    WebLocalFrameImpl* webframeChild;
+    {
+        TRACE_EVENT0("blink", "WebLocalFrameImpl::createChildframe sync IPC");
+        webframeChild = toWebLocalFrameImpl(m_client->createChildFrame(this, scope, name, uniqueName, static_cast<WebSandboxFlags>(ownerElement->getSandboxFlags()), ownerProperties));
+    }
     if (!webframeChild)
         return nullptr;
 
     webframeChild->initializeCoreFrame(frame()->host(), ownerElement, name, uniqueName);
     // Initializing the core frame may cause the new child to be detached, since
     // it may dispatch a load event in the parent.
     if (!webframeChild->parent())
         return nullptr;
 
     // If we're moving in the back/forward list, we might want to replace the content
@@ skipping 608 matching lines @@
 {
     frame()->loader().forceSandboxFlags(static_cast<SandboxFlags>(flags));
 }
 
 void WebLocalFrameImpl::clearActiveFindMatch()
 {
     ensureTextFinder().clearActiveFindMatch();
 }
 
 } // namespace blink