Remove search::GetSearchTerms since it always returns empty string

components/toolbar/toolbar_model_delegate.h

Index: components/toolbar/toolbar_model_delegate.h
diff --git a/components/toolbar/toolbar_model_delegate.h b/components/toolbar/toolbar_model_delegate.h
index 33f95c883d0e3e633d36dd6787e4b9d4e6be8c50..4bec77c372b319fe64c74519fa290975161b4d8e 100644
--- a/components/toolbar/toolbar_model_delegate.h
+++ b/components/toolbar/toolbar_model_delegate.h
@@ -40,12 +40,6 @@ class ToolbarModelDelegate {
   // user edits that may be in progress.
   virtual SecurityLevel GetSecurityLevel() const = 0;
 
-  // Returns search terms as in search::GetSearchTerms() if such terms should
-  // appear in the omnibox (i.e. the page is sufficiently secure, search term
-  // replacement is enabled, editing is not in progress, etc.) given that the
-  // page has a security level of |security_level|.
-  virtual base::string16 GetSearchTerms(SecurityLevel security_level) const = 0;
-
   // Returns the certificate for the current navigation entry.
   virtual scoped_refptr<net::X509Certificate> GetCertificate() const = 0;