Add a new field trial for Instant.

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 "base/rand_util.h"
@@ skipping 406 matching lines @@
 void InstantController::InstantStatusChanged(InstantLoader* loader) {
   DCHECK(loader_.get());
   UpdateIsDisplayable();
 }
 
 void InstantController::SetSuggestedTextFor(
     InstantLoader* loader,
     const string16& text,
     InstantCompleteBehavior behavior) {
   if (!is_out_of_date_ &&
-      !InstantFieldTrial::IsHiddenExperiment(tab_contents_->profile())) {
+      InstantFieldTrial::ShouldSetSuggestedText(tab_contents_->profile())) {
     delegate_->SetSuggestedText(text, behavior);
   }
 }
 
 gfx::Rect InstantController::GetInstantBounds() {
   return delegate_->GetInstantBounds();
 }
 
 bool InstantController::ShouldCommitInstantOnMouseUp() {
   return commit_on_mouse_up_;
@@ skipping 52 matching lines @@
   }
 }
 
 void InstantController::UpdateLoader(const TemplateURL* template_url,
                                      const GURL& url,
                                      content::PageTransition transition_type,
                                      const string16& user_text,
                                      bool verbatim,
                                      string16* suggested_text) {
   is_out_of_date_ = false;
-  bool hidden = InstantFieldTrial::IsHiddenExperiment(tab_contents_->profile());
-  if (!hidden)
+  if (!InstantFieldTrial::IsHiddenExperiment(tab_contents_->profile()))
     loader_->SetOmniboxBounds(omnibox_bounds_);
   loader_->Update(tab_contents_, template_url, url, transition_type, user_text,
                   verbatim, suggested_text);
   UpdateIsDisplayable();
   // For the HIDDEN and SILENT field trials, don't send back suggestions.
-  if (hidden)
+  if (!InstantFieldTrial::ShouldSetSuggestedText(tab_contents_->profile()))
     suggested_text->clear();
 }
 
 bool InstantController::ShouldUseInstant(const AutocompleteMatch& match) {
   TemplateURLService* model = TemplateURLServiceFactory::GetForProfile(
       tab_contents_->profile());
   if (!model)
     return false;
 
   const TemplateURL* default_t_url = model->GetDefaultSearchProvider();
@@ skipping 36 matching lines @@
   if (destroy_factory_.empty()) {
     MessageLoop::current()->PostTask(
         FROM_HERE, destroy_factory_.NewRunnableMethod(
             &InstantController::DestroyLoaders));
   }
 }
 
 void InstantController::DestroyLoaders() {
   loaders_to_destroy_.reset();
 }