add print to pdf for headless

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 <string>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 12 matching lines @@
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/common/bindings_policy.h"
 #include "content/public/common/origin_util.h"
 #include "headless/lib/browser/headless_browser_context_impl.h"
 #include "headless/lib/browser/headless_browser_impl.h"
 #include "headless/lib/browser/headless_browser_main_parts.h"
 #include "headless/lib/browser/headless_devtools_client_impl.h"
+#include "headless/lib/browser/headless_print_manager.h"
 #include "services/service_manager/public/cpp/interface_registry.h"
 
 namespace headless {
 
 // static
 HeadlessWebContentsImpl* HeadlessWebContentsImpl::From(
     HeadlessWebContents* web_contents) {
   // This downcast is safe because there is only one implementation of
   // HeadlessWebContents.
   return static_cast<HeadlessWebContentsImpl*>(web_contents);
@@ skipping 122 matching lines @@
 HeadlessWebContentsImpl::HeadlessWebContentsImpl(
     content::WebContents* web_contents,
     HeadlessBrowserContextImpl* browser_context)
     : content::WebContentsObserver(web_contents),
       web_contents_delegate_(
           new HeadlessWebContentsImpl::Delegate(browser_context)),
       web_contents_(web_contents),
       agent_host_(content::DevToolsAgentHost::GetOrCreateFor(web_contents)),
       browser_context_(browser_context),
       render_process_host_(web_contents->GetRenderProcessHost()) {
+  printing::HeadlessPrintManager::CreateForWebContents(web_contents);
   web_contents_->SetDelegate(web_contents_delegate_.get());
   render_process_host_->AddObserver(this);
 }
 
 HeadlessWebContentsImpl::~HeadlessWebContentsImpl() {
   if (render_process_host_)
     render_process_host_->RemoveObserver(this);
 }
 
 void HeadlessWebContentsImpl::RenderFrameCreated(
@@ skipping 133 matching lines @@
 HeadlessWebContents::Builder::MojoService::MojoService() {}
 
 HeadlessWebContents::Builder::MojoService::MojoService(
     const std::string& service_name,
     const base::Callback<void(mojo::ScopedMessagePipeHandle)>& service_factory)
     : service_name(service_name), service_factory(service_factory) {}
 
 HeadlessWebContents::Builder::MojoService::~MojoService() {}
 
 }  // namespace headless