Headless demo

headless/lib/headless_shell_main_delegate.cc

Index: headless/lib/headless_shell_main_delegate.cc
diff --git a/headless/lib/headless_shell_main_delegate.cc b/headless/lib/headless_shell_main_delegate.cc
new file mode 100644
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+++ b/headless/lib/headless_shell_main_delegate.cc
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+// 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/headless_shell_main_delegate.h"
+
+#include "headless/lib/browser/headless_content_browser_client.h"
+#include "headless/lib/renderer/headless_content_renderer_client.h"
+#include "headless/lib/utility/headless_content_utility_client.h"
+
+#include "base/command_line.h"
+#include "base/logging.h"
+#include "base/path_service.h"
+#include "base/run_loop.h"
+#include "base/trace_event/trace_event.h"
+#include "content/common/content_constants_internal.h"
+#include "content/public/browser/browser_main_runner.h"
+#include "content/public/common/content_switches.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/ozone/public/ozone_switches.h"
+#include "headless/lib/headless_browser_impl.h"
+
+namespace {
+
+void InitLogging() {
+  base::FilePath log_filename;
+  PathService::Get(base::DIR_EXE, &log_filename);
+  log_filename = log_filename.AppendASCII("headless_test_shell.log");
+  logging::LoggingSettings settings;
+  settings.logging_dest = logging::LOG_TO_ALL;
+  settings.log_file = log_filename.value().c_str();
+  settings.delete_old = logging::DELETE_OLD_LOG_FILE;
+  logging::InitLogging(settings);
+  logging::SetLogItems(true, true, true, true);
+}
+
+}  // namespace
+
+namespace headless {
+
+HeadlessShellMainDelegate::HeadlessShellMainDelegate(
+    HeadlessBrowserImpl* browser)
+  : browser_(browser) { }
+
+HeadlessShellMainDelegate::~HeadlessShellMainDelegate() { }
+
+bool HeadlessShellMainDelegate::BasicStartupComplete(int* exit_code) {
+  base::CommandLine& command_line = *base::CommandLine::ForCurrentProcess();
+
+  InitLogging();
+
+  command_line.AppendSwitch(switches::kNoSandbox);
+  command_line.AppendSwitch(switches::kSingleProcess);
+
+  // TODO(skyostil): Investigate using Mesa/SwiftShader for output.
+  command_line.AppendSwitch(switches::kDisableGpu);
+
+  SetContentClient(&content_client_);
+  return false;
+}
+
+void HeadlessShellMainDelegate::PreSandboxStartup() {
+  InitializeResourceBundle();
+}
+
+int HeadlessShellMainDelegate::RunProcess(
+    const std::string& process_type,
+    const content::MainFunctionParams& main_function_params) {
+  if (!process_type.empty())
+    return -1;
+
+  base::trace_event::TraceLog::GetInstance()->SetProcessName("HeadlessBrowser");
+  base::trace_event::TraceLog::GetInstance()->SetProcessSortIndex(
+      content::kTraceEventBrowserProcessSortIndex);
+
+  scoped_ptr<content::BrowserMainRunner> browser_runner_(
+      content::BrowserMainRunner::Create());
+
+  int exit_code = browser_runner_->Initialize(main_function_params);
+
+  DCHECK_LT(exit_code, 0) << "content::BrowserMainRunner::Initialize failed in "
+                             "HeadlessShellMainDelegate::RunProcess";
+
+  browser_->RunOnStartCallback();
+
+  browser_runner_->Run();
+
+  browser_runner_->Shutdown();
+
+  // Return value >=0 here to disable calling content::BrowserMain.
+  return 0;
+}
+
+void HeadlessShellMainDelegate::ZygoteForked() {
+  // TODO(skyostil): Disable the zygote host.
+}
+
+// static
+void HeadlessShellMainDelegate::InitializeResourceBundle() {
+  base::FilePath pak_file;
+  bool r = PathService::Get(base::DIR_MODULE, &pak_file);
+  DCHECK(r);
+  pak_file = pak_file.Append(FILE_PATH_LITERAL("content_shell.pak"));
+  ui::ResourceBundle::InitSharedInstanceWithPakPath(pak_file);
+}
+
+content::ContentBrowserClient*
+HeadlessShellMainDelegate::CreateContentBrowserClient() {
+  browser_client_.reset(new HeadlessContentBrowserClient(browser_));
+  return browser_client_.get();
+}
+
+content::ContentRendererClient*
+HeadlessShellMainDelegate::CreateContentRendererClient() {
+  renderer_client_.reset(new HeadlessContentRendererClient);
+  return renderer_client_.get();
+}
+
+content::ContentUtilityClient*
+HeadlessShellMainDelegate::CreateContentUtilityClient() {
+  utility_client_.reset(new HeadlessContentUtilityClient);
+  return utility_client_.get();
+}
+
+}  // namespace headless