Refactor Instant web UI (chrome://settings page).

chrome/browser/instant/instant_controller.cc

 // Copyright (c) 2011 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/instant/instant_controller.h"
 
 #include "base/command_line.h"
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "build/build_config.h"
@@ skipping 117 matching lines @@
 
   int64 enable_time = service->GetInt64(prefs::kInstantEnabledTime);
   if (enable_time) {
     base::TimeDelta delta =
         base::Time::Now() - base::Time::FromInternalValue(enable_time);
     // Histogram from 1 minute to 10 days.
     UMA_HISTOGRAM_CUSTOM_COUNTS("Instant.TimeToDisable.Predictive",
                                 delta.InMinutes(), 1, 60 * 24 * 10, 50);
   }
 
+  service->SetBoolean(prefs::kInstantEnabledOnce, true);
   service->SetBoolean(prefs::kInstantEnabled, false);
 }
 
 // static
 bool InstantController::CommitIfCurrent(InstantController* controller) {
   if (controller && controller->IsCurrent()) {
     controller->CommitCurrentPreview(INSTANT_COMMIT_PRESSED_ENTER);
     return true;
   }
   return false;
@@ skipping 584 matching lines @@
   if (destroy_factory_.empty()) {
     MessageLoop::current()->PostTask(
         FROM_HERE, destroy_factory_.NewRunnableMethod(
             &InstantController::DestroyLoaders));
   }
 }
 
 void InstantController::DestroyLoaders() {
   loaders_to_destroy_.reset();
 }