Break chrome_initial's dependence on //components/startup_metric_utils/browser:lib

chrome/app/chrome_main_delegate.h

 // 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.
 
 #ifndef CHROME_APP_CHROME_MAIN_DELEGATE_H_
 #define CHROME_APP_CHROME_MAIN_DELEGATE_H_
 
+#include <stdint.h>
+
 #include <memory>
 
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "chrome/common/chrome_content_client.h"
 #include "content/public/app/content_main_delegate.h"
 
 template <typename>
 class ScopedVector;
 
 namespace base {
 class CommandLine;
 }
 
 // Chrome implementation of ContentMainDelegate.
 class ChromeMainDelegate : public content::ContentMainDelegate {
  public:
   ChromeMainDelegate();
+  // |exe_entry_point_ticks| is the time at which the main function of the
+  // executable was entered, or 0 if not available.
+  explicit ChromeMainDelegate(int64_t exe_entry_point_ticks);

[fdoray, 2016/09/20 12:25:22]

I understand why it's more conservative to use int64_t in ChromeMain, but here I
would use base::TimeTicks. I prefer to put the value back in a TimeTicks as soon
as possible to minimize the amount of code where it's ambiguous how time is
represented.

[grt (UTC plus 2), 2016/09/20 19:20:26]

I like it. Done.

   ~ChromeMainDelegate() override;
 
  protected:
   // content::ContentMainDelegate implementation:
   bool BasicStartupComplete(int* exit_code) override;
   void PreSandboxStartup() override;
   void SandboxInitialized(const std::string& process_type) override;
   int RunProcess(
       const std::string& process_type,
       const content::MainFunctionParams& main_function_params) override;
@@ skipping 20 matching lines @@
                             const std::string& process_type);
   void SetUpInstallerPreferences(const base::CommandLine& command_line);
 #endif  // defined(OS_MACOSX)
 
   ChromeContentClient chrome_content_client_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeMainDelegate);
 };
 
 #endif  // CHROME_APP_CHROME_MAIN_DELEGATE_H_