Move instant support to SearchTabHelper.

chrome/browser/google/google_util.cc

Index: chrome/browser/google/google_util.cc
diff --git a/chrome/browser/google/google_util.cc b/chrome/browser/google/google_util.cc
index e2c09ecd930cc9a5127c68d41a45e0cdca448836..fc92fd3ba2a6e22ce0c81b58df86b560e8133342 100644
--- a/chrome/browser/google/google_util.cc
+++ b/chrome/browser/google/google_util.cc
@@ -17,6 +17,8 @@
 #include "chrome/browser/google/google_url_tracker.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/installer/util/google_update_settings.h"
+#include "content/public/browser/navigation_entry.h"
+#include "content/public/common/page_transition_types.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/registry_controlled_domains/registry_controlled_domain.h"
 #include "net/base/url_util.h"
@@ -152,6 +154,13 @@ bool GetReactivationBrand(std::string* brand) {
 
 #endif
 
+bool IsOmniboxGoogleSearchNavigation(const content::NavigationEntry& entry) {
+  const content::PageTransition stripped_transition =
+      PageTransitionStripQualifier(entry.GetTransitionType());
+  DCHECK(IsGoogleSearchUrl(entry.GetURL().spec()));
+  return stripped_transition == content::PAGE_TRANSITION_GENERATED;
+}
+
 bool IsGoogleDomainUrl(const std::string& url,
                        SubdomainPermission subdomain_permission,
                        PortPermission port_permission) {