Support sharing of ContentMain and BrowserMain code with embedded use cases.

content/browser/browser_main_runner.cc

 // Copyright (c) 2011 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 "content/browser/browser_main.h"
+#include "content/public/browser/browser_main_runner.h"
 
 #include "base/allocator/allocator_shim.h"
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "content/browser/browser_main_loop.h"
 #include "content/browser/notification_service_impl.h"
 #include "content/common/child_process.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/main_function_params.h"
 
 #if defined(OS_WIN)
 #include "base/win/scoped_com_initializer.h"
 #endif
 
 namespace {
 
 bool g_exited_main_message_loop = false;
 
-}  // namespace
+class BrowserMainRunnerImpl : public content::BrowserMainRunner {

[jam, 2012/01/31 21:11:29]

ditto for inliing these methods

+ public:
+  BrowserMainRunnerImpl();
+  ~BrowserMainRunnerImpl();
 
-namespace content {
+  virtual int Initialize(const content::MainFunctionParams& parameters)
+      OVERRIDE;
+  virtual int Run() OVERRIDE;
+  virtual void Shutdown() OVERRIDE;
 
-bool ExitedMainMessageLoop() {
-  return g_exited_main_message_loop;
+ protected:
+  // True if the runner has been initialized.
+  bool is_initialized_;
+
+  // True if the runner has been shut down.
+  bool is_shutdown_;
+
+  scoped_ptr<NotificationServiceImpl> notification_service_;
+  scoped_ptr<content::BrowserMainLoop> main_loop_;
+#if defined(OS_WIN)
+  scoped_ptr<base::win::ScopedCOMInitializer> com_initializer_;
+#endif
+  scoped_ptr<base::StatisticsRecorder> statistics_;
+
+  DISALLOW_COPY_AND_ASSIGN(BrowserMainRunnerImpl);
+};
+
+BrowserMainRunnerImpl::BrowserMainRunnerImpl()
+    : is_initialized_(false),
+      is_shutdown_(false) {
 }
 
-}  // namespace content
+BrowserMainRunnerImpl::~BrowserMainRunnerImpl() {
+  if (is_initialized_ && !is_shutdown_)
+    Shutdown();
+}
 
-// Main routine for running as the Browser process.
-int BrowserMain(const content::MainFunctionParams& parameters) {
-  TRACE_EVENT_BEGIN_ETW("BrowserMain", 0, "");
+int BrowserMainRunnerImpl::Initialize(
+    const content::MainFunctionParams& parameters) {
+  is_initialized_ = true;
 
   // ChildProcess:: is a misnomer unless you consider context.  Use
   // of --wait-for-debugger only makes sense when Chrome itself is a
   // child process (e.g. when launched by PyAuto).
   if (parameters.command_line.HasSwitch(switches::kWaitForDebugger))
     ChildProcess::WaitForDebugger("Browser");
 
-  NotificationServiceImpl main_notification_service;
+  notification_service_.reset(new NotificationServiceImpl);
 
-  scoped_ptr<content::BrowserMainLoop> main_loop(
-      new content::BrowserMainLoop(parameters));
+  main_loop_.reset(new content::BrowserMainLoop(parameters));
 
-  main_loop->Init();
+  main_loop_->Init();
 
-  main_loop->EarlyInitialization();
+  main_loop_->EarlyInitialization();
 
   // Must happen before we try to use a message loop or display any UI.
-  main_loop->InitializeToolkit();
+  main_loop_->InitializeToolkit();
 
-  main_loop->MainMessageLoopStart();
+  main_loop_->MainMessageLoopStart();
 
   // WARNING: If we get a WM_ENDSESSION, objects created on the stack here
   // are NOT deleted. If you need something to run during WM_ENDSESSION add it
   // to browser_shutdown::Shutdown or BrowserProcess::EndSession.
 
   // !!!!!!!!!! READ ME !!!!!!!!!!
   // I (viettrungluu) am in the process of refactoring |BrowserMain()|. If you
   // need to add something above this comment, read the documentation in
   // browser_main.h. If you need to add something below, please do the
   // following:
@@ skipping 15 matching lines @@
 
 #if defined(OS_WIN)
 #if !defined(NO_TCMALLOC)
   // When linking shared libraries, NO_TCMALLOC is defined, and dynamic
   // allocator selection is not supported.
 
   // Make this call before going multithreaded, or spawning any subprocesses.
   base::allocator::SetupSubprocessAllocator();
 #endif
 
-  base::win::ScopedCOMInitializer com_initializer;
+  com_initializer_.reset(new base::win::ScopedCOMInitializer);
 #endif  // OS_WIN
 
-  base::StatisticsRecorder statistics;
+  statistics_.reset(new base::StatisticsRecorder);
 
-  main_loop->RunMainMessageLoopParts(&g_exited_main_message_loop);
+  main_loop_->CreateThreads();
 
-  TRACE_EVENT_END_ETW("BrowserMain", 0, 0);
+  // Return -1 to indicate no early termination.
+  return -1;
+}
 
-  return main_loop->GetResultCode();
+int BrowserMainRunnerImpl::Run() {
+  DCHECK(is_initialized_);
+  DCHECK(!is_shutdown_);
+  main_loop_->RunMainMessageLoopParts();
+  return main_loop_->GetResultCode();
 }
+
+void BrowserMainRunnerImpl::Shutdown() {
+  DCHECK(is_initialized_);
+  DCHECK(!is_shutdown_);
+  g_exited_main_message_loop = true;
+  main_loop_->ShutdownThreadsAndCleanUp();
+
+  statistics_.reset(NULL);
+
+#if defined(OS_WIN)
+  com_initializer_.reset(NULL);
+#endif
+
+  main_loop_.reset(NULL);
+
+  notification_service_.reset(NULL);
+
+  is_shutdown_ = true;
+}
+
+}  // namespace
+
+namespace content {
+
+// static
+BrowserMainRunner* BrowserMainRunner::Create() {
+  return new BrowserMainRunnerImpl();
+}
+
+bool ExitedMainMessageLoop() {
+  return g_exited_main_message_loop;
+}
+
+}  // namespace content