Makes mojo WebUI run main only after page finishes loading

content/renderer/web_ui_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/web_ui_mojo_context_state.h"
 
 #include "base/bind.h"
 #include "base/stl_util.h"
 #include "content/public/renderer/resource_fetcher.h"
 #include "content/renderer/web_ui_runner.h"
@@ skipping 95 matching lines @@
                             base::Unretained(this), fetcher));
 }
 
 void WebUIMojoContextState::OnFetchModuleComplete(
     ResourceFetcher* fetcher,
     const blink::WebURLResponse& response,
     const std::string& data) {
   DCHECK_EQ(kModulePrefix,
       response.url().string().utf8().substr(0, arraysize(kModulePrefix) - 1));
   const std::string module =
-      response.url().string().utf8().substr(arraysize(kModulePrefix));
+      response.url().string().utf8().substr(arraysize(kModulePrefix) - 1);
   // We can't delete fetch right now as the arguments to this function come from
   // it and are used below. Instead use a scope_ptr to cleanup.
   scoped_ptr<ResourceFetcher> deleter(fetcher);
   module_fetchers_.weak_erase(
       std::find(module_fetchers_.begin(), module_fetchers_.end(), fetcher));
   if (data.empty()) {
     NOTREACHED();
     return;  // TODO(sky): log something?
   }
 
   runner_->Run(data, module);
 }
 
 void WebUIMojoContextState::OnDidAddPendingModule(
     const std::string& id,
     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