Move GetVersionStringModifier() and GetChannel() from platform_util_* to chrome_version_info_*

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 fd551ee2125f26f2816e5414a2635ebaca8c06ef..1619e0a8bc683dda68e0299a365379ad66ef2ed3 100644
--- a/chrome/browser/upgrade_detector_impl.cc
+++ b/chrome/browser/upgrade_detector_impl.cc
@@ -14,7 +14,6 @@
 #include "base/task.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
-#include "chrome/browser/platform_util.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/installer/util/browser_distribution.h"
@@ -112,9 +111,9 @@ class DetectUpgradeTask : public Task {
     installed_version.reset(Version::GetVersionFromString(reply));
 #endif
 
-    platform_util::Channel channel = platform_util::GetChannel();
-    *is_unstable_channel_ = channel == platform_util::CHANNEL_DEV ||
-                            channel == platform_util::CHANNEL_CANARY;
+    chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
+    *is_unstable_channel_ = channel == chrome::VersionInfo::CHANNEL_DEV ||
+                            channel == chrome::VersionInfo::CHANNEL_CANARY;
 
     // Get the version of the currently *running* instance of Chrome.
     chrome::VersionInfo version_info;