Rip out browser-side RID caching for most visited items.

chrome/browser/search/search.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/search/search.h"
 
 #include "base/command_line.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
@@ skipping 681 matching lines @@
   // Extended mode instant requires a search terms replacement key.
   return instant_url.is_valid() &&
          (!IsInstantExtendedAPIEnabled() ||
           template_url->HasSearchTermsReplacementKey(instant_url));
 }
 
 void ResetInstantExtendedOptInStateGateForTest() {
   instant_extended_opt_in_state_gate = false;
 }
 
+bool AreMostVisitedItemsEqual(
+    const std::vector<InstantMostVisitedItem>& new_items,
+    const std::vector<InstantMostVisitedItem>& old_items) {
+  if (new_items.size() != old_items.size())
+    return false;
+
+  for (size_t i = 0; i < old_items.size(); ++i) {
+    if (old_items[i].url != new_items[i].url ||
+        old_items[i].title != new_items[i].title)
+      return false;
+  }
+  return true;
+}
+
 }  // namespace chrome