headless: Initial headless embedder API implementation

headless/lib/browser/headless_browser_main_parts.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_browser_main_parts.h"
+
+#include "components/devtools_http_handler/devtools_http_handler.h"
+#include "headless/lib/browser/headless_browser_context.h"
+#include "headless/lib/browser/headless_browser_impl.h"
+#include "headless/lib/browser/headless_devtools.h"
+#include "headless/lib/browser/headless_screen.h"
+#include "ui/aura/env.h"
+#include "ui/gfx/screen.h"
+
+namespace headless {
+
+namespace {
+
+void PlatformInitialize() {
+  HeadlessScreen* screen = HeadlessScreen::Create(gfx::Size());
+  gfx::Screen::SetScreenInstance(screen);
+}
+
+void PlatformExit() {
+  aura::Env::DeleteInstance();
+}
+
+}  // namespace
+
+HeadlessBrowserMainParts::HeadlessBrowserMainParts(HeadlessBrowserImpl* browser)
+    : browser_(browser) {}
+
+HeadlessBrowserMainParts::~HeadlessBrowserMainParts() {}
+
+void HeadlessBrowserMainParts::PreMainMessageLoopRun() {
+  browser_context_.reset(new HeadlessBrowserContext(browser_->options()));
+  if (browser_->options().devtools_endpoint.address().IsValid()) {
+    devtools_http_handler_ =
+        CreateLocalDevToolsHttpHandler(browser_context_.get());
+  }
+  PlatformInitialize();
+}
+
+void HeadlessBrowserMainParts::PostMainMessageLoopRun() {
+  browser_context_.reset();
+  devtools_http_handler_.reset();
+  PlatformExit();
+}
+
+HeadlessBrowserContext* HeadlessBrowserMainParts::browser_context() const {
+  return browser_context_.get();
+}
+
+}  // namespace headless