Get chrome:// dev tool urls hooked up in content_shell.

content/public/app/content_main_delegate.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_APP_CONTENT_MAIN_DELEGATE_H_
 #define CONTENT_PUBLIC_APP_CONTENT_MAIN_DELEGATE_H_
 #pragma once
 
 #include <string>
 
 #include "build/build_config.h"
 
 namespace content {
 
 class ZygoteForkDelegate;
 struct MainFunctionParams;
 
 class ContentMainDelegate {
  public:
   virtual ~ContentMainDelegate() {}
 
-  // Tells the embedder that the absolute basic startup has been done, i.e. it's
-  // now safe to create singletons and check the command line. Return true if
-  // the process should exit afterwards, and if so, |exit_code| should be set.
-  // This is the place for embedder to do the things that must happen at the
-  // start. Most of its startup code should be in the methods below.
+  // Tells the embedder that the absolute basic startup has been done, i.e.
+  // it's now safe to create singletons and check the command line. Return true
+  // if the process should exit afterwards, and if so, |exit_code| should be
+  // set. This is the place for embedder to do the things that must happen at
+  // the start. Most of its startup code should be in the methods below.
+  // Notably, prior to successful return, the delegate is expected to have
+  // called content::SetContentClient().
   virtual bool BasicStartupComplete(int* exit_code) = 0;
 
   // This is where the embedder puts all of its startup code that needs to run
   // before the sandbox is engaged.
   virtual void PreSandboxStartup() = 0;
 
   // This is where the embedder can add startup code to run after the sandbox
   // has been initialized.
   virtual void SandboxInitialized(const std::string& process_type) = 0;
 
@@ skipping 28 matching lines @@
   virtual content::ZygoteForkDelegate* ZygoteStarting() = 0;
 
   // Called every time the zygote process forks.
   virtual void ZygoteForked() = 0;
 #endif  // OS_MACOSX
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_APP_CONTENT_MAIN_DELEGATE_H_