Upstream Chrome on iOS source code [1/11].

ios/chrome/app/startup/ios_chrome_main.mm

+// Copyright 2012 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 "ios/chrome/app/startup/ios_chrome_main.h"
+
+#import <UIKit/UIKit.h>
+
+#include <vector>
+
+#include "base/logging.h"
+#include "base/strings/sys_string_conversions.h"
+#include "base/time/time.h"
+#include "ios/web/public/app/web_main_runner.h"
+
+namespace {
+base::Time* g_start_time;
+}  // namespace
+
+IOSChromeMain::IOSChromeMain() {
+  web_main_runner_.reset(web::WebMainRunner::Create());
+
+  web::WebMainParams main_params = web::WebMainParams(&main_delegate_);
+// Copy NSProcessInfo arguments into WebMainParams in debug only, since
+// command line should be meaningless outside of developer builds.
+#if !defined(NDEBUG)
+  NSArray* arguments = [[NSProcessInfo processInfo] arguments];
+  main_params.argc = [arguments count];
+  const char* argv[main_params.argc];
+  std::vector<std::string> argv_store;
+
+  // Avoid using std::vector::push_back (or any other method that could cause
+  // the vector to grow) as this will cause the std::string to be copied or
+  // moved (depends on the C++ implementation) which may invalidates the pointer
+  // returned by std::string::c_str(). Even if the strings are moved, this may
+  // cause garbage if std::string uses optimisation for small strings (by
+  // returning pointer to the object internals in that case).
+  argv_store.resize([arguments count]);
+  for (NSUInteger i = 0; i < [arguments count]; i++) {
+    argv_store[i] = base::SysNSStringToUTF8([arguments objectAtIndex:i]);
+    argv[i] = argv_store[i].c_str();
+  }
+  main_params.argv = argv;
+#endif
+
+  // Chrome registers an AtExitManager in main in order to initialize breakpad
+  // early, so prevent a second registration by WebMainRunner.
+  main_params.register_exit_manager = false;
+  web_main_runner_->Initialize(main_params);
+}
+
+IOSChromeMain::~IOSChromeMain() {
+  web_main_runner_->ShutDown();
+}
+
+// static
+void IOSChromeMain::InitStartTime() {
+  DCHECK(!g_start_time);
+  g_start_time = new base::Time(base::Time::Now());
+}
+
+// static
+const base::Time& IOSChromeMain::StartTime() {
+  CHECK(g_start_time);
+  return *g_start_time;
+}