[Reland] Allow headless TabSocket in isolated worlds & remove obsolete logic

content/renderer/mojo_context_state.cc

 // Copyright 2014 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.
 
 #include "content/renderer/mojo_context_state.h"
 
 #include <stddef.h>
 
 #include <map>
 #include <string>
@@ skipping 97 matching lines @@
   return source_iter->second;
 }
 
 std::string GetModulePrefixForBindingsType(MojoBindingsType bindings_type,
                                            blink::WebLocalFrame* frame) {
   switch (bindings_type) {
     case MojoBindingsType::FOR_WEB_UI:
       return frame->GetSecurityOrigin().ToString().Utf8() + "/";
     case MojoBindingsType::FOR_LAYOUT_TESTS:
       return "layout-test-mojom://";
-    case MojoBindingsType::FOR_HEADLESS:
-      return "headless-mojom://";
   }
   NOTREACHED();
   return "";
 }
 
 }  // namespace
 
 MojoContextState::MojoContextState(blink::WebLocalFrame* frame,
                                    v8::Local<v8::Context> context,
                                    MojoBindingsType bindings_type)
@@ skipping 103 matching lines @@
     const std::vector<std::string>& dependencies) {
   FetchModules(dependencies);
 
   gin::ContextHolder* context_holder = runner_->GetContextHolder();
   gin::ModuleRegistry* registry = gin::ModuleRegistry::From(
       context_holder->context());
   registry->AttemptToLoadMoreModules(context_holder->isolate());
 }
 
 }  // namespace content