Componentize component_updater: Replace content::BrowserThread usage with task runners

chrome/browser/component_updater/component_updater_configurator.cc

Index: chrome/browser/component_updater/component_updater_configurator.cc
diff --git a/chrome/browser/component_updater/component_updater_configurator.cc b/chrome/browser/component_updater/component_updater_configurator.cc
index 5e8d04712fcbd1d6b6bfda5a94c13dc386da3cc6..1b70139de39326471d3e6e0eaa5846342a553b01 100644
--- a/chrome/browser/component_updater/component_updater_configurator.cc
+++ b/chrome/browser/component_updater/component_updater_configurator.cc
@@ -16,6 +16,7 @@
 #include "chrome/browser/omaha_query_params/chrome_omaha_query_params_delegate.h"
 #include "chrome/common/chrome_version_info.h"
 #include "components/component_updater/component_updater_switches.h"
+#include "content/public/browser/browser_thread.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "url/gurl.h"
 
@@ -114,6 +115,10 @@ class ChromeConfigurator : public Configurator {
   virtual bool InProcess() const OVERRIDE;
   virtual bool DeltasEnabled() const OVERRIDE;
   virtual bool UseBackgroundDownloader() const OVERRIDE;
+  virtual scoped_refptr<base::SequencedTaskRunner> GetSequencedTaskRunner()
+      const OVERRIDE;
+  virtual scoped_refptr<base::SingleThreadTaskRunner>
+      GetSingleThreadTaskRunner() const OVERRIDE;
 
  private:
   net::URLRequestContextGetter* url_request_getter_;
@@ -230,6 +235,20 @@ bool ChromeConfigurator::UseBackgroundDownloader() const {
   return background_downloads_enabled_;
 }
 
+scoped_refptr<base::SequencedTaskRunner>
+ChromeConfigurator::GetSequencedTaskRunner() const {
+  return content::BrowserThread::GetBlockingPool()
+      ->GetSequencedTaskRunnerWithShutdownBehavior(
+          content::BrowserThread::GetBlockingPool()->GetSequenceToken(),
+          base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);
+}
+
+scoped_refptr<base::SingleThreadTaskRunner>
+ChromeConfigurator::GetSingleThreadTaskRunner() const {
+  return content::BrowserThread::GetMessageLoopProxyForThread(
+      content::BrowserThread::FILE);
+}
+
 Configurator* MakeChromeComponentUpdaterConfigurator(
     const base::CommandLine* cmdline,
     net::URLRequestContextGetter* context_getter) {