Remove a variety of no-longer-used query params.

chrome/browser/search/instant_service.cc

Index: chrome/browser/search/instant_service.cc
diff --git a/chrome/browser/search/instant_service.cc b/chrome/browser/search/instant_service.cc
index 1c168e92b837f1ec8d6bc1b5900ee69725afac33..ff33a789f0b856ed1fb61dd398f9b79bb3da1a44 100644
--- a/chrome/browser/search/instant_service.cc
+++ b/chrome/browser/search/instant_service.cc
@@ -70,7 +70,6 @@ bool IsLocalNTPSuggestionServiceEnabled() {
 InstantService::InstantService(Profile* profile)
     : profile_(profile),
       template_url_service_(TemplateURLServiceFactory::GetForProfile(profile_)),
-      omnibox_start_margin_(search::kDisableStartMargin),
       suggestions_service_(NULL),
       weak_ptr_factory_(this) {
   // The initialization below depends on a typical set of browser threads. Skip
@@ -294,12 +293,6 @@ void InstantService::SendSearchURLsToRenderer(content::RenderProcessHost* rph) {
       search::GetSearchURLs(profile_), search::GetNewTabPageURL(profile_)));
 }
 
-void InstantService::OnOmniboxStartMarginChanged(int start_margin) {
-  omnibox_start_margin_ = start_margin;
-  FOR_EACH_OBSERVER(InstantServiceObserver, observers_,
-                    OmniboxStartMarginChanged(omnibox_start_margin_));
-}
-
 void InstantService::OnRendererProcessTerminated(int process_id) {
   process_ids_.erase(process_id);