PlzNavigate: Invoke didStartProvisionalLoad() when the renderer initiates a navigation in startLoad(

extensions/renderer/extension_frame_helper.cc

 // Copyright 2013 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 "extensions/renderer/extension_frame_helper.h"
 
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/string_util.h"
 #include "base/timer/elapsed_timer.h"
 #include "content/public/renderer/render_frame.h"
@@ skipping 169 matching lines @@
 }
 
 void ExtensionFrameHelper::DidMatchCSS(
     const blink::WebVector<blink::WebString>& newly_matching_selectors,
     const blink::WebVector<blink::WebString>& stopped_matching_selectors) {
   extension_dispatcher_->content_watcher()->DidMatchCSS(
       render_frame()->GetWebFrame(), newly_matching_selectors,
       stopped_matching_selectors);
 }
 
-void ExtensionFrameHelper::DidStartProvisionalLoad() {
+void ExtensionFrameHelper::DidStartProvisionalLoad(
+    blink::WebDataSource* data_source) {
   if (!delayed_main_world_script_initialization_)
     return;
 
   delayed_main_world_script_initialization_ = false;
   v8::HandleScope handle_scope(v8::Isolate::GetCurrent());
   v8::Local<v8::Context> context =
       render_frame()->GetWebFrame()->mainWorldScriptContext();
   v8::Context::Scope context_scope(context);
   extension_dispatcher_->DidCreateScriptContext(render_frame()->GetWebFrame(),
                                                 context, 0);
@@ skipping 115 matching lines @@
     const base::ListValue& args) {
   extension_dispatcher_->InvokeModuleSystemMethod(
       render_frame(), extension_id, module_name, function_name, args);
 }
 
 void ExtensionFrameHelper::OnDestruct() {
   delete this;
 }
 
 }  // namespace extensions