Set linux distro to CHROMEOS_RELEASE_DESCRIPTION on ChromeOS

chrome/browser/chrome_browser_main_linux.h

Index: chrome/browser/chrome_browser_main_linux.h
diff --git a/chrome/browser/chrome_browser_main_linux.h b/chrome/browser/chrome_browser_main_linux.h
index 4f993778919fc4c5dabee75d77dfd2aaaf80b814..b1d1521011abcfdf0e65187c4e83a85f13cc51a7 100644
--- a/chrome/browser/chrome_browser_main_linux.h
+++ b/chrome/browser/chrome_browser_main_linux.h
@@ -9,8 +9,13 @@
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
+#include "chrome/browser/cancelable_request.h"
 #include "chrome/browser/chrome_browser_main_posix.h"
 
+#if defined(OS_CHROMEOS)
+#include "chrome/browser/chromeos/version_loader.h"
+#endif
+
 #if !defined(OS_CHROMEOS)
 namespace chrome {
 class MediaDeviceNotificationsLinux;
@@ -33,6 +38,11 @@ class ChromeBrowserMainPartsLinux : public ChromeBrowserMainPartsPosix {
       media_device_notifications_linux_;
 #endif
 
+#if defined(OS_CHROMEOS)
+  chromeos::VersionLoader cros_version_loader_;
+  CancelableRequestConsumer cros_consumer_;
+#endif
+
   DISALLOW_COPY_AND_ASSIGN(ChromeBrowserMainPartsLinux);
 };