Plumbing devtools agent host id and request id between processes

third_party/WebKit/Source/core/inspector/IdentifiersFactory.cpp

 /*
  * Copyright (C) 2011 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 31 matching lines @@
 }  // namespace
 
 // static
 String IdentifiersFactory::CreateIdentifier() {
   int identifier = AtomicIncrement(&g_last_used_identifier);
   return AddProcessIdPrefixTo(identifier);
 }
 
 // static
 String IdentifiersFactory::RequestId(unsigned long identifier) {
+  // Odd request Ids are set by the browser.  For those we use a PID of 0
+  // because for browser side navigations the PID may not be known when an event
+  // is sent because the renderer hasn't been created yet.
+  int signed_identifier = static_cast<int>(identifier);
+  if (signed_identifier < 0) {
+    StringBuilder builder;
+    builder.Append("0.");
+    builder.AppendNumber(signed_identifier);
+    return builder.ToString();
+  }
   return identifier ? AddProcessIdPrefixTo(identifier) : String();
 }
 
 // static
 String IdentifiersFactory::FrameId(LocalFrame* frame) {
   return AddProcessIdPrefixTo(WeakIdentifierMap<LocalFrame>::Identifier(frame));
 }
 
 // static
 LocalFrame* IdentifiersFactory::FrameById(InspectedFrames* inspected_frames,
@@ skipping 45 matching lines @@
   size_t dot_index = id.Find('.');
 
   if (dot_index == kNotFound) {
     *ok = false;
     return 0;
   }
   return id.Substring(dot_index + 1).ToInt(ok);
 }
 
 }  // namespace blink