Minor comment and style updates for on-demand update check code.

BUG=none
R=ganesh@chromium.org,pkasting@chromium.org

Review URL: https://codereview.chromium.org/1141073002

Cr-Commit-Position: refs/heads/master@{#329941}

chrome/browser/google/google_update_win.cc

@@ -139,12 +139,12 @@ HRESULT CreateGoogleUpdate3WebClass(
     return google_update->CreateInstance(CLSID_GoogleUpdate3WebUserClass);
 
   // For a system-level install, update checks can be done by a normal user with
-  // the ServiceClass.
+  // the MachineClass.
   if (!install_update_if_possible)
     return google_update->CreateInstance(CLSID_GoogleUpdate3WebMachineClass);
 
   // For a system-level install, an update requires Admin privileges for writing
-  // to %ProgramFiles%. Elevate while instantiating the ServiceClass.
+  // to %ProgramFiles%. Elevate while instantiating the MachineClass.
   return CoCreateInstanceAsAdmin(CLSID_GoogleUpdate3WebMachineClass,
                                  IID_IGoogleUpdate3Web, elevation_window,
                                  google_update->ReceiveVoid());

chrome/browser/ui/webui/help/version_updater_basic.cc

@@ -20,7 +20,6 @@ void VersionUpdaterBasic::RelaunchBrowser() const {
   chrome::AttemptRestart();
 }
 
-VersionUpdater* VersionUpdater::Create(
-    content::WebContents* /* web_contents */) {
+VersionUpdater* VersionUpdater::Create(content::WebContents* web_contents) {
   return new VersionUpdaterBasic;
 }