Increase timer slack for several browser threads.

content/browser/browser_main_loop.cc

 // Copyright (c) 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 "content/browser/browser_main_loop.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/file_util.h"
@@ skipping 580 matching lines @@
     startup_task_runner_->RunAllTasksNow();
   }
 #else
   startup_task_runner_->RunAllTasksNow();
 #endif
 }
 
 int BrowserMainLoop::CreateThreads() {
   TRACE_EVENT0("startup", "BrowserMainLoop::CreateThreads");
 
-  base::Thread::Options default_options;
   base::Thread::Options io_message_loop_options;
   io_message_loop_options.message_loop_type = base::MessageLoop::TYPE_IO;
   base::Thread::Options ui_message_loop_options;
   ui_message_loop_options.message_loop_type = base::MessageLoop::TYPE_UI;
 
   // Start threads in the order they occur in the BrowserThread::ID
   // enumeration, except for BrowserThread::UI which is the main
   // thread.
   //
   // Must be size_t so we can increment it.
   for (size_t thread_id = BrowserThread::UI + 1;
        thread_id < BrowserThread::ID_COUNT;
        ++thread_id) {
     scoped_ptr<BrowserProcessSubThread>* thread_to_start = NULL;
-    base::Thread::Options* options = &default_options;
+    base::Thread::Options options;
 
     switch (thread_id) {
       case BrowserThread::DB:
         TRACE_EVENT_BEGIN1("startup",
             "BrowserMainLoop::CreateThreads:start",
             "Thread", "BrowserThread::DB");
         thread_to_start = &db_thread_;
+        options.timer_slack = base::TIMER_SLACK_MAXIMUM;
         break;
       case BrowserThread::FILE_USER_BLOCKING:
         TRACE_EVENT_BEGIN1("startup",
             "BrowserMainLoop::CreateThreads:start",
             "Thread", "BrowserThread::FILE_USER_BLOCKING");
         thread_to_start = &file_user_blocking_thread_;
         break;
       case BrowserThread::FILE:
         TRACE_EVENT_BEGIN1("startup",
             "BrowserMainLoop::CreateThreads:start",
             "Thread", "BrowserThread::FILE");
         thread_to_start = &file_thread_;
 #if defined(OS_WIN)
         // On Windows, the FILE thread needs to be have a UI message loop
         // which pumps messages in such a way that Google Update can
         // communicate back to us.
-        options = &ui_message_loop_options;
+        options = ui_message_loop_options;
 #else
-        options = &io_message_loop_options;
+        options = io_message_loop_options;
 #endif
+        options.timer_slack = base::TIMER_SLACK_MAXIMUM;
         break;
       case BrowserThread::PROCESS_LAUNCHER:
         TRACE_EVENT_BEGIN1("startup",
             "BrowserMainLoop::CreateThreads:start",
             "Thread", "BrowserThread::PROCESS_LAUNCHER");
         thread_to_start = &process_launcher_thread_;
+        options.timer_slack = base::TIMER_SLACK_MAXIMUM;
         break;
       case BrowserThread::CACHE:
         TRACE_EVENT_BEGIN1("startup",
             "BrowserMainLoop::CreateThreads:start",
             "Thread", "BrowserThread::CACHE");
         thread_to_start = &cache_thread_;
-        options = &io_message_loop_options;
+        options = io_message_loop_options;
+        options.timer_slack = base::TIMER_SLACK_MAXIMUM;
         break;
       case BrowserThread::IO:
         TRACE_EVENT_BEGIN1("startup",
             "BrowserMainLoop::CreateThreads:start",
             "Thread", "BrowserThread::IO");
         thread_to_start = &io_thread_;
-        options = &io_message_loop_options;
+        options = io_message_loop_options;
         break;
       case BrowserThread::UI:
       case BrowserThread::ID_COUNT:
       default:
         NOTREACHED();
         break;
     }
 
     BrowserThread::ID id = static_cast<BrowserThread::ID>(thread_id);
 
     if (thread_to_start) {
       (*thread_to_start).reset(new BrowserProcessSubThread(id));
-      (*thread_to_start)->StartWithOptions(*options);
+      (*thread_to_start)->StartWithOptions(options);
     } else {
       NOTREACHED();
     }
 
     TRACE_EVENT_END0("startup", "BrowserMainLoop::CreateThreads:start");
   }
   created_threads_ = true;
   return result_code_;
 }
 
@@ skipping 453 matching lines @@
       base::TimeDelta::FromSeconds(delay_secs));
 }
 
 void BrowserMainLoop::EndStartupTracing(const base::FilePath& trace_file) {
   is_tracing_startup_ = false;
   TracingController::GetInstance()->DisableRecording(
       trace_file, base::Bind(&OnStoppedStartupTracing));
 }
 
 }  // namespace content