Start moving code from BrowserMain to content, so that it can be reused by all embedders of conte...

content/browser/browser_main.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 "base/allocator/allocator_shim.h"
+#include "base/command_line.h"
+#include "base/debug/trace_event.h"
+#include "base/logging.h"
+#include "base/metrics/field_trial.h"
+#include "base/metrics/histogram.h"
+#include "base/system_monitor/system_monitor.h"
+#include "content/browser/browser_thread.h"
+#include "content/browser/content_browser_client.h"
+#include "content/common/content_switches.h"
+#include "content/common/hi_res_timer_manager.h"
+#include "content/common/main_function_params.h"
+#include "content/common/sandbox_policy.h"
+#include "net/base/network_change_notifier.h"
+#include "net/base/ssl_config_service.h"
+#include "net/socket/tcp_client_socket.h"
+
+#if defined(OS_WIN)
+#include <windows.h>
+#include <commctrl.h>
+#include <shellapi.h>
+
+#include "sandbox/src/sandbox.h"
+#endif
+
+#if defined(OS_POSIX) && !defined(OS_MACOSX)
+#include <dbus/dbus-glib.h>
+#endif
+
+#if defined(TOOLKIT_USES_GTK)
+#include "ui/gfx/gtk_util.h"
+#endif
+
+namespace {
+
+// Windows-specific initialization code for the sandbox broker services. This
+// is just a NOP on non-Windows platforms to reduce ifdefs later on.
+void InitializeBrokerServices(const MainFunctionParams& parameters,
+                              const CommandLine& parsed_command_line) {
+#if defined(OS_WIN)
+  sandbox::BrokerServices* broker_services =
+      parameters.sandbox_info_.BrokerServices();
+  if (broker_services) {
+    sandbox::InitBrokerServices(broker_services);
+    if (!parsed_command_line.HasSwitch(switches::kNoSandbox)) {
+      bool use_winsta = !parsed_command_line.HasSwitch(
+                            switches::kDisableAltWinstation);
+      // Precreate the desktop and window station used by the renderers.
+      sandbox::TargetPolicy* policy = broker_services->CreatePolicy();
+      sandbox::ResultCode result = policy->CreateAlternateDesktop(use_winsta);
+      CHECK(sandbox::SBOX_ERROR_FAILED_TO_SWITCH_BACK_WINSTATION != result);
+      policy->Release();
+    }
+  }
+#endif
+}
+
+#if defined(TOOLKIT_USES_GTK)
+static void GLibLogHandler(const gchar* log_domain,
+                           GLogLevelFlags log_level,
+                           const gchar* message,
+                           gpointer userdata) {
+  if (!log_domain)
+    log_domain = "<unknown>";
+  if (!message)
+    message = "<no message>";
+
+  if (strstr(message, "Loading IM context type") ||
+      strstr(message, "wrong ELF class: ELFCLASS64")) {
+    // http://crbug.com/9643
+    // Until we have a real 64-bit build or all of these 32-bit package issues
+    // are sorted out, don't fatal on ELF 32/64-bit mismatch warnings and don't
+    // spam the user with more than one of them.
+    static bool alerted = false;
+    if (!alerted) {
+      LOG(ERROR) << "Bug 9643: " << log_domain << ": " << message;
+      alerted = true;
+    }
+  } else if (strstr(message, "Theme file for default has no") ||
+             strstr(message, "Theme directory") ||
+             strstr(message, "theme pixmap")) {
+    LOG(ERROR) << "GTK theme error: " << message;
+  } else if (strstr(message, "gtk_drag_dest_leave: assertion")) {
+    LOG(ERROR) << "Drag destination deleted: http://crbug.com/18557";
+  } else if (strstr(message, "Out of memory") &&
+             strstr(log_domain, "<unknown>")) {
+    LOG(ERROR) << "DBus call timeout or out of memory: "
+               << "http://crosbug.com/15496";
+  } else {
+    LOG(DFATAL) << log_domain << ": " << message;
+  }
+}
+
+static void SetUpGLibLogHandler() {
+  // Register GLib-handled assertions to go through our logging system.
+  const char* kLogDomains[] = { NULL, "Gtk", "Gdk", "GLib", "GLib-GObject" };
+  for (size_t i = 0; i < arraysize(kLogDomains); i++) {
+    g_log_set_handler(kLogDomains[i],
+                      static_cast<GLogLevelFlags>(G_LOG_FLAG_RECURSION |
+                                                  G_LOG_FLAG_FATAL |
+                                                  G_LOG_LEVEL_ERROR |
+                                                  G_LOG_LEVEL_CRITICAL |
+                                                  G_LOG_LEVEL_WARNING),
+                      GLibLogHandler,
+                      NULL);
+  }
+}
+#endif
+
+}  // namespace
+
+namespace content {
+
+BrowserMainParts::BrowserMainParts(const MainFunctionParams& parameters)
+    : parameters_(parameters),
+      parsed_command_line_(parameters.command_line_) {
+}
+
+BrowserMainParts::~BrowserMainParts() {
+}
+
+void BrowserMainParts::EarlyInitialization() {
+  PreEarlyInitialization();
+
+  if (parsed_command_line().HasSwitch(switches::kEnableBenchmarking))
+    base::FieldTrial::EnableBenchmarking();
+
+  InitializeSSL();
+
+  if (parsed_command_line().HasSwitch(switches::kDisableSSLFalseStart))
+    net::SSLConfigService::DisableFalseStart();
+  if (parsed_command_line().HasSwitch(switches::kEnableSSLCachedInfo))
+    net::SSLConfigService::EnableCachedInfo();
+  if (parsed_command_line().HasSwitch(switches::kEnableOriginBoundCerts))
+    net::SSLConfigService::EnableOriginBoundCerts();
+  if (parsed_command_line().HasSwitch(
+          switches::kEnableDNSCertProvenanceChecking)) {
+    net::SSLConfigService::EnableDNSCertProvenanceChecking();
+  }
+
+  // TODO(abarth): Should this move to InitializeNetworkOptions?  This doesn't
+  // seem dependent on InitializeSSL().
+  if (parsed_command_line().HasSwitch(switches::kEnableTcpFastOpen))
+    net::set_tcp_fastopen_enabled(true);
+
+  PostEarlyInitialization();
+}
+
+void BrowserMainParts::MainMessageLoopStart() {
+  PreMainMessageLoopStart();
+
+  main_message_loop_.reset(new MessageLoop(MessageLoop::TYPE_UI));
+
+  // TODO(viettrungluu): should these really go before setting the thread name?
+  system_monitor_.reset(new base::SystemMonitor);
+  hi_res_timer_manager_.reset(new HighResolutionTimerManager);
+
+  InitializeMainThread();
+
+  network_change_notifier_.reset(net::NetworkChangeNotifier::Create());
+
+  PostMainMessageLoopStart();
+}
+
+void BrowserMainParts::InitializeMainThread() {
+  const char* kThreadName = "CrBrowserMain";
+  base::PlatformThread::SetName(kThreadName);
+  main_message_loop().set_thread_name(kThreadName);
+
+  // Register the main thread by instantiating it, but don't call any methods.
+  main_thread_.reset(new BrowserThread(BrowserThread::UI,
+                                       MessageLoop::current()));
+}
+
+void BrowserMainParts::InitializeToolkit() {
+  // TODO(evan): this function is rather subtle, due to the variety
+  // of intersecting ifdefs we have.  To keep it easy to follow, there
+  // are no #else branches on any #ifs.
+
+#if defined(TOOLKIT_USES_GTK)
+  // We want to call g_thread_init(), but in some codepaths (tests) it
+  // is possible it has already been called.  In older versions of
+  // GTK, it is an error to call g_thread_init twice; unfortunately,
+  // the API to tell whether it has been called already was also only
+  // added in a newer version of GTK!  Thankfully, this non-intuitive
+  // check is actually equivalent and sufficient to work around the
+  // error.
+  if (!g_thread_supported())
+    g_thread_init(NULL);
+  // Glib type system initialization. Needed at least for gconf,
+  // used in net/proxy/proxy_config_service_linux.cc. Most likely
+  // this is superfluous as gtk_init() ought to do this. It's
+  // definitely harmless, so retained as a reminder of this
+  // requirement for gconf.
+  g_type_init();
+  // We use glib-dbus for geolocation and it's possible other libraries
+  // (e.g. gnome-keyring) will use it, so initialize its threading here
+  // as well.
+  dbus_g_thread_init();
+  gfx::GtkInitFromCommandLine(parameters().command_line_);
+  SetUpGLibLogHandler();
+#endif
+
+#if defined(TOOLKIT_GTK)
+  // It is important for this to happen before the first run dialog, as it
+  // styles the dialog as well.
+  gfx::InitRCStyles();
+#endif
+
+#if defined(OS_WIN)
+  // Init common control sex.
+  INITCOMMONCONTROLSEX config;
+  config.dwSize = sizeof(config);
+  config.dwICC = ICC_WIN95_CLASSES;
+  if (!InitCommonControlsEx(&config))
+    LOG_GETLASTERROR(FATAL);
+#endif
+
+  ToolkitInitialized();
+}
+
+void BrowserMainParts::PreEarlyInitialization() {
+}
+
+void BrowserMainParts::PostEarlyInitialization() {
+}
+
+void BrowserMainParts::PreMainMessageLoopStart() {
+}
+
+void BrowserMainParts::PostMainMessageLoopStart() {
+}
+
+void BrowserMainParts::InitializeSSL() {
+}
+
+void BrowserMainParts::ToolkitInitialized() {
+}
+
+int BrowserMainParts::TemporaryContinue() {
+  return 0;
+}
+
+}  // namespace content
+
+// Main routine for running as the Browser process.
+int BrowserMain(const MainFunctionParams& parameters) {
+  TRACE_EVENT_BEGIN_ETW("BrowserMain", 0, "");
+
+  scoped_ptr<content::BrowserMainParts> parts(
+      content::GetContentClient()->browser()->CreateBrowserMainParts(
+          parameters));
+
+  parts->EarlyInitialization();
+
+  // Must happen before we try to use a message loop or display any UI.
+  parts->InitializeToolkit();
+
+  parts->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:
+  //  - Figure out where you should add your code. Do NOT just pick a random
+  //    location "which works".
+  //  - Document the dependencies apart from compile-time-checkable ones. What
+  //    must happen before your new code is executed? Does your new code need to
+  //    run before something else? Are there performance reasons for executing
+  //    your code at that point?
+  //  - If you need to create a (persistent) object, heap allocate it and keep a
+  //    |scoped_ptr| to it rather than allocating it on the stack. Otherwise
+  //    I'll have to convert your code when I refactor.
+  //  - Unless your new code is just a couple of lines, factor it out into a
+  //    function with a well-defined purpose. Do NOT just add it inline in
+  //    |BrowserMain()|.
+  // Thanks!
+
+  // TODO(viettrungluu): put the remainder into BrowserMainParts
+  const CommandLine& parsed_command_line = parameters.command_line_;
+
+#if defined(OS_WIN) && !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  // OS_WIN
+
+  // The broker service initialization needs to run early because it will
+  // initialize the sandbox broker, which requires the process to swap its
+  // window station. During this time all the UI will be broken. This has to
+  // run before threads and windows are created.
+  InitializeBrokerServices(parameters, parsed_command_line);
+
+  // Initialize histogram statistics gathering system.
+  base::StatisticsRecorder statistics;
+
+  // TODO(jam): bring the content parts from this chrome function here.
+  int result_code = parts->TemporaryContinue();
+
+  // Release BrowserMainParts here, before shutting down CrosLibrary, since
+  // some of the classes initialized there have CrosLibrary dependencies.
+  parts.reset(NULL);
+
+  TRACE_EVENT_END_ETW("BrowserMain", 0, 0);
+  return result_code;
+}