Add a boolean histogram "Chrome.CommandLineUseSystemSSL" to keep track of

"--use-system-ssl" usage. The flag forces the user to use SSLClientSocket[Mac,
  Win], instead of the default NSS SSL implementation.

I also changed the order of initialize callings in
BrowserMainRunnerImpl::Initialize(), because originally the StatisticsRecorder
was created after main loop flag parsing so the new histogram can not be
recorded. Since StatisticsRecorder has few dependencies, I think this will
not have negative effect.

BUG=102003

Review URL: http://codereview.chromium.org/9570052

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@124770 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/browser_main_loop.cc

@@ -259,6 +259,7 @@ void BrowserMainLoop::EarlyInitialization() {
   } else {
     init_nspr = true;
   }
+  UMA_HISTOGRAM_BOOLEAN("Chrome.CommandLineUseSystemSSL", !init_nspr);
 #elif defined(USE_NSS)
   init_nspr = true;
 #endif

content/browser/browser_main_runner.cc

@@ -47,6 +47,8 @@ class BrowserMainRunnerImpl : public content::BrowserMainRunner {
     if (parameters.command_line.HasSwitch(switches::kWaitForDebugger))
       ChildProcess::WaitForDebugger("Browser");
 
+    statistics_.reset(new base::StatisticsRecorder);
+
     notification_service_.reset(new NotificationServiceImpl);
 
     main_loop_.reset(new content::BrowserMainLoop(parameters));
@@ -76,8 +78,6 @@ class BrowserMainRunnerImpl : public content::BrowserMainRunner {
     com_initializer_.reset(new base::win::ScopedCOMInitializer);
 #endif  // OS_WIN
 
-    statistics_.reset(new base::StatisticsRecorder);
-
     main_loop_->CreateThreads();
     int result_code = main_loop_->GetResultCode();
     if (result_code > 0)
@@ -103,8 +103,6 @@ class BrowserMainRunnerImpl : public content::BrowserMainRunner {
     if (created_threads_)
       main_loop_->ShutdownThreadsAndCleanUp();
 
-    statistics_.reset(NULL);
-
 #if defined(OS_WIN)
     com_initializer_.reset(NULL);
 #endif
@@ -113,6 +111,8 @@ class BrowserMainRunnerImpl : public content::BrowserMainRunner {
 
     notification_service_.reset(NULL);
 
+    statistics_.reset(NULL);
+
     is_shutdown_ = true;
   }