Componentize VersionInfo.

chrome/browser/upgrade_detector_impl.cc

Index: chrome/browser/upgrade_detector_impl.cc
diff --git a/chrome/browser/upgrade_detector_impl.cc b/chrome/browser/upgrade_detector_impl.cc
index 3ea01870f271b411315afaa75c82de926f017c00..22cc663d5bde43a3eedc4e65b7668e3bc5d99a5c 100644
--- a/chrome/browser/upgrade_detector_impl.cc
+++ b/chrome/browser/upgrade_detector_impl.cc
@@ -97,9 +97,9 @@ bool IsUnstableChannel() {
   // but no anymore. But other platform may still need the file thread.
   // crbug.com/366647.
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
-  chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
-  return channel == chrome::VersionInfo::CHANNEL_DEV ||
-         channel == chrome::VersionInfo::CHANNEL_CANARY;
+  version_info::Channel channel = chrome::VersionInfo::GetChannel();
+  return channel == version_info::CHANNEL_DEV ||
+         channel == version_info::CHANNEL_CANARY;
 }
 
 // This task identifies whether we are running an unstable version. And then it