[Chrome源码阅读]Chrome启动代码流程1

HINSTANCE dll_handle = ::LoadLibraryEx (dll_name, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);                                    
	// Initialize the crash reporter.
	InitCrashReporter( client_util::GetDLLPath (dll_name, dll_path));	
	bool exit_now = true ;
	if ( ShowRestartDialogIfCrashed(&exit_now )) {
		// We have restarted because of a previous crash. The user might
		// decide that he does not want to continue.
		if ( exit_now) return ResultCodes ::NORMAL_EXIT;	
	}
	
	if ( NULL != dll_handle ) {
		client_util:: DLL_MAIN entry = reinterpret_cast< client_util::DLL_MAIN >(
			:: GetProcAddress(dll_handle , "ChromeMain"));
	if ( NULL != entry )
		return (entry )(instance, & sandbox_info, command_line );
	}

int rv = -1;
    if ( process_type == switches ::kRendererProcess) 
	{
        rv = RendererMain(main_params );
    } else if (process_type == switches:: kPluginProcess) 
	{
#if defined (OS_WIN)
		rv = PluginMain(main_params );
#endif
    } 
	else if (process_type == switches:: kWorkerProcess) 
	{
#if defined (OS_WIN)
		rv = WorkerMain(main_params );
#endif
    }
	else if (process_type .empty()) 
	{
#if defined (OS_LINUX)
		// gtk_init() can change |argc| and |argv|, but nobody else uses them.
		gtk_init(&argc, const_cast<char***>(&argv));
#endif

    ScopedOleInitializer ole_initializer;
    rv = BrowserMain(main_params );
    } 
	else 
    {
		NOTREACHED() << "Unknown process type";
    }

scoped_ptr< BrowserProcess> browser_process ;
	if ( parsed_command_line.HasSwitch (switches:: kImport)) {
		// We use different BrowserProcess when importing so no GoogleURLTracker is
		// instantiated (as it makes a URLRequest and we don't have an IO thread,
		// see bug #1292702).
		browser_process. reset(new FirstRunBrowserProcess(parsed_command_line ));
		is_first_run = false;
    } else {
		browser_process. reset(new BrowserProcessImpl( parsed_command_line));
    }

g_browser_process = this;  // line 112 of browser_process_impl.cc

int result_code = ResultCodes ::NORMAL_EXIT;
	if ( parameters .ui_task ) {
	if ( pool ) pool -> Recycle();
		MessageLoopForUI:: current ()->PostTask ( FROM_HERE, parameters .ui_task );
		RunUIMessageLoop( browser_process .get ());
	} else if (BrowserInit :: ProcessCommandLine( parsed_command_line ,
											std ::wstring (), local_state, true ,
											profile , &result_code )) {
	if ( pool ) pool -> Recycle();
		RunUIMessageLoop( browser_process .get ());
	}

LaunchWithProfile lwp(cur_dir, command_line);
	bool launched = lwp.Launch(profile, process_startup);

// Open the required browser windows and tabs.
    // First, see if we're being run as a web application (thin frame window).
	if (!OpenApplicationURL(profile)) {
		std::vector<GURL> urls_to_open = GetURLsFromCommandLine(profile_);
		RecordLaunchModeHistogram(urls_to_open.empty()?
									LM_TO_BE_DECIDED : LM_WITH_URLS);
		// Always attempt to restore the last session. OpenStartupURLs only opens
		// the home pages if no additional URLs were passed on the command line.
		if (!OpenStartupURLs(process_startup, urls_to_open)) {
			// Add the home page and any special first run URLs.
			Browser* browser = NULL;
			if (urls_to_open.empty())
			AddStartupURLs(&urls_to_open);
			else
			browser = BrowserList::GetLastActive();
			OpenURLsInBrowser(browser, process_startup, urls_to_open);
			// NOTE: 这个函数返回的browser指针并没有被销毁，内存泄漏？
			// 其实并没有，Browser生命期交给了BrowserView来管理
		}
	} else {
		RecordLaunchModeHistogram(LM_AS_WEBAPP);
	}

Browser * BrowserInit :: LaunchWithProfile::OpenURLsInBrowser (
    					Browser* browser ,
    					bool process_startup ,
    					const std ::vector < GURL>& urls ) {
    DCHECK(! urls .empty ());
	if (! browser || browser -> type() != Browser ::TYPE_NORMAL )
    browser = Browser ::Create ( profile_);

	for ( size_t i = 0; i < urls .size (); ++ i) {
		TabContents* tab = browser -> AddTabWithURL(
        urls [i ], GURL(), PageTransition ::START_PAGE , ( i == 0), NULL );
		if ( i == 0 && process_startup )
			AddCrashedInfoBarIfNecessary (tab );
	}
    browser-> window ()->Show ();
    // TODO(jcampan): http://crbug.com/8123 we should not need to set the initial
    //                focus explicitly.
    browser-> GetSelectedTabContents ()->SetInitialFocus ();
    return browser ;
}