headless: Implement client API generation

headless/lib/browser/headless_web_contents_impl.cc

 // Copyright 2015 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 "headless/lib/browser/headless_web_contents_impl.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/weak_ptr.h"
 #include "base/trace_event/trace_event.h"
+#include "content/public/browser/devtools_agent_host.h"
 #include "content/public/browser/navigation_handle.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/common/bindings_policy.h"
 #include "content/public/common/service_registry.h"
 #include "content/public/renderer/render_frame.h"
+#include "headless/lib/browser/headless_devtools_client_impl.h"
 #include "ui/aura/window.h"
 
 namespace headless {
 
 class WebContentsObserverAdapter : public content::WebContentsObserver {
  public:
   WebContentsObserverAdapter(content::WebContents* web_contents,
                              HeadlessWebContents::Observer* observer)
       : content::WebContentsObserver(web_contents), observer_(observer) {}
 
   ~WebContentsObserverAdapter() override {}
 
-  void RenderViewReady() override { observer_->WebContentsReady(); }
+  void RenderViewReady() override {
+    DCHECK(web_contents()->GetMainFrame()->IsRenderFrameLive());
+    observer_->DevToolsTargetReady();
+  }
 
   void DocumentOnLoadCompletedInMainFrame() override {
     observer_->DocumentOnLoadCompletedInMainFrame();
   }
 
   void DidFinishNavigation(
       content::NavigationHandle* navigation_handle) override {
     observer_->DidFinishNavigation(navigation_handle->HasCommitted() &&
                                    !navigation_handle->IsErrorPage());
   }
@@ skipping 55 matching lines @@
   observer_map_[observer] = base::WrapUnique(
       new WebContentsObserverAdapter(web_contents_.get(), observer));
 }
 
 void HeadlessWebContentsImpl::RemoveObserver(Observer* observer) {
   ObserverMap::iterator it = observer_map_.find(observer);
   DCHECK(it != observer_map_.end());
   observer_map_.erase(it);
 }
 
+HeadlessDevToolsTarget* HeadlessWebContentsImpl::GetDevToolsTarget() {
+  return web_contents()->GetMainFrame()->IsRenderFrameLive() ? this : nullptr;
+}
+
+void HeadlessWebContentsImpl::AttachClient(HeadlessDevToolsClient* client) {
+  if (!agent_host_)
+    agent_host_ = content::DevToolsAgentHost::GetOrCreateFor(web_contents());
+  HeadlessDevToolsClientImpl::From(client)->AttachToHost(agent_host_.get());
+}
+
+void HeadlessWebContentsImpl::DetachClient(HeadlessDevToolsClient* client) {
+  DCHECK(agent_host_);
+  HeadlessDevToolsClientImpl::From(client)->DetachFromHost(agent_host_.get());
+}
+
 content::WebContents* HeadlessWebContentsImpl::web_contents() const {
   return web_contents_.get();
 }
 
 }  // namespace headless