headless: Introduce a browser context

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"
@@ skipping 147 matching lines @@
 
 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();
 }
 
+HeadlessWebContents::Builder::Builder(HeadlessBrowserImpl* browser)
+    : browser_(browser) {}
+
+HeadlessWebContents::Builder::~Builder() = default;
+
+HeadlessWebContents::Builder::Builder(Builder&&) = default;
+
+HeadlessWebContents::Builder& HeadlessWebContents::Builder::SetInitialURL(
+    const GURL& initial_url) {
+  initial_url_ = initial_url;
+  return *this;
+}
+
+HeadlessWebContents::Builder& HeadlessWebContents::Builder::SetWindowSize(
+    const gfx::Size& size) {
+  window_size_ = size;
+  return *this;
+}
+
+HeadlessWebContents::Builder& HeadlessWebContents::Builder::SetBrowserContext(
+    HeadlessBrowserContext* browser_context) {
+  browser_context_ = browser_context;
+  return *this;
+}
+
+HeadlessWebContents* HeadlessWebContents::Builder::Build() {
+  return browser_->CreateWebContents(this);
+}
+
 }  // namespace headless