Merge local_omnibox_popup into local_ntp. Render the Google logo and fakebox if Google is the sear…

chrome/browser/ui/search/instant_controller.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/ui/search/instant_controller.h"
 
 #include "base/metrics/histogram.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
@@ skipping 250 matching lines @@
       UTF16ToUTF8(user_text).c_str(), UTF16ToUTF8(full_text).c_str(),
       static_cast<int>(selection_start), static_cast<int>(selection_end),
       verbatim, user_input_in_progress, omnibox_popup_is_open, escape_pressed,
       is_keyword_search));
 
   // TODO(dhollowa): Complete keyword match UI.  For now just hide suggestions.
   // http://crbug.com/153932.  Note, this early escape is happens prior to the
   // DCHECKs below because |user_text| and |full_text| have different semantics
   // when keyword search is in effect.
   if (is_keyword_search) {
-    if (UseInstantTabToShowSuggestions())
+    if (instant_tab_)
       instant_tab_->Update(string16(), 0, 0, true);
     else
       HideOverlay();
     last_match_was_search_ = false;
     return false;
   }
 
   // Ignore spurious updates when the omnibox is blurred; otherwise click
   // targets on the page may vanish before a click event arrives.
   if (omnibox_focus_state_ == OMNIBOX_FOCUS_NONE)
@@ skipping 32 matching lines @@
   // In non extended mode, Instant is disabled for URLs and keyword mode.
   if (!extended_enabled_ &&
       (!last_match_was_search_ ||
        match.type == AutocompleteMatch::SEARCH_OTHER_ENGINE)) {
     HideOverlay();
     return false;
   }
 
   // If we have an |instant_tab_| use it, else ensure we have an overlay that is
   // current or is using the local overlay.
-  if (!UseInstantTabToShowSuggestions() &&
-      !(overlay_ && overlay_->IsLocalOverlay()) &&
+  if (!instant_tab_ && !(overlay_ && overlay_->IsLocal()) &&
       !EnsureOverlayIsCurrent(false)) {
     HideOverlay();
     return false;
   }
 
   if (extended_enabled_) {
     if (!omnibox_popup_is_open) {
       if (!user_input_in_progress) {
         // If the user isn't typing and the omnibox popup is closed, it means a
         // regular navigation, tab-switch or the user hitting Escape.
-        if (UseInstantTabToShowSuggestions()) {
+        if (instant_tab_) {
           // The user is on a search results page. It may be showing results for
           // a partial query the user typed before they hit Escape. Send the
           // omnibox text to the page to restore the original results.
           //
           // In a tab switch, |instant_tab_| won't have updated yet, so it may
           // be pointing to the previous tab (which was a search results page).
           // Ensure we don't send the omnibox text to a random webpage (the new
           // tab), by comparing the old and new WebContents.
           if (escape_pressed &&
               instant_tab_->contents() == browser_->GetActiveWebContents()) {
@@ skipping 12 matching lines @@
           // If |full_text| is empty, the user is on the NTP. The overlay may
           // be showing custom NTP content; hide only if that's not the case.
           HideOverlay();
         }
       } else if (full_text.empty()) {
         // The user is typing, and backspaced away all omnibox text. Clear
         // |last_omnibox_text_| so that we don't attempt to set suggestions.
         last_omnibox_text_.clear();
         last_user_text_.clear();
         last_suggestion_ = InstantSuggestion();
-        if (UseInstantTabToShowSuggestions()) {
+        if (instant_tab_) {
           // On a search results page, tell it to clear old results.
           instant_tab_->Update(string16(), 0, 0, true);
         } else if (search_mode_.is_origin_ntp()) {
           // On the NTP, tell the overlay to clear old results. Don't hide the
           // overlay so it can show a blank page or logo if it wants.
           overlay_->Update(string16(), 0, 0, true);
         } else {
           HideOverlay();
         }
       } else {
         // The user switched to a tab with partial text already in the omnibox.
         HideOverlay();
 
         // The new tab may or may not be a search results page; we don't know
         // since SearchModeChanged() hasn't been called yet. If it later turns
         // out to be, we should store |full_text| now, so that if the user hits
         // Enter, we'll send the correct query to instant_tab_->Submit(). If the
         // partial text is not a query (|last_match_was_search_| is false), we
         // won't Submit(), so no need to worry about that.
         last_omnibox_text_ = full_text;
         last_user_text_ = user_text;
         last_suggestion_ = InstantSuggestion();
       }
       return false;
     } else if (full_text.empty()) {
       // The user typed a solitary "?". Same as the backspace case above.
       last_omnibox_text_.clear();
       last_user_text_.clear();
       last_suggestion_ = InstantSuggestion();
-      if (UseInstantTabToShowSuggestions())
+      if (instant_tab_)
         instant_tab_->Update(string16(), 0, 0, true);
       else if (search_mode_.is_origin_ntp())
         overlay_->Update(string16(), 0, 0, true);
       else
         HideOverlay();
       return false;
     }
   } else if (!omnibox_popup_is_open || full_text.empty()) {
     // In the non-extended case, hide the overlay as long as the user isn't
     // actively typing a non-empty query.
@@ skipping 34 matching lines @@
   last_verbatim_ = verbatim;
 
   last_transition_type_ = match.transition;
   url_for_history_ = match.destination_url;
 
   // Allow search suggestions. In extended mode, SearchModeChanged() will set
   // this, but it's not called in non-extended mode, so fake it.
   if (!extended_enabled_)
     search_mode_.mode = SearchMode::MODE_SEARCH_SUGGESTIONS;
 
-  if (UseInstantTabToShowSuggestions()) {
+  if (instant_tab_) {
     // If we have an |instant_tab_| but it doesn't support Instant yet, sever
     // the connection to it so we use the overlay instead. This ensures that the
     // user interaction will be responsive and handles cases where
     // |instant_tab_| never responds about whether it supports Instant.
     if (instant_tab_->supports_instant())
       instant_tab_->Update(user_text, selection_start, selection_end, verbatim);
     else
       instant_tab_.reset();
   }
 
-  if (!UseInstantTabToShowSuggestions()) {
+  if (!instant_tab_) {
     if (first_interaction_time_.is_null())
       first_interaction_time_ = base::Time::Now();
     allow_overlay_to_show_search_suggestions_ = true;
 
     // For extended mode, if the loader is not ready at this point, switch over
     // to a backup loader.
     if (extended_enabled_ && !overlay_->supports_instant() &&
-        !overlay_->IsLocalOverlay() && browser_->GetActiveWebContents()) {
-      CreateOverlay(chrome::kChromeSearchLocalOmniboxPopupURL,
+        !overlay_->IsLocal() && browser_->GetActiveWebContents()) {
+      CreateOverlay(chrome::GetLocalInstantURL(browser_->profile()).spec(),
                     browser_->GetActiveWebContents());
     }
 
     overlay_->Update(extended_enabled_ ? user_text : full_text,
                      selection_start, selection_end, verbatim);
   }
 
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_INSTANT_CONTROLLER_UPDATED,
       content::Source<InstantController>(this),
       content::NotificationService::NoDetails());
 
   // We don't have new suggestions yet, but we can either reuse the existing
   // suggestion or reset the existing "gray text".
   browser_->SetInstantSuggestion(last_suggestion_);
 
   return true;
 }
 
 scoped_ptr<content::WebContents> InstantController::ReleaseNTPContents() {
   if (!extended_enabled_ || !browser_->profile() ||
       browser_->profile()->IsOffTheRecord())
     return scoped_ptr<content::WebContents>(NULL);
 
   LOG_INSTANT_DEBUG_EVENT(this, "ReleaseNTPContents");
 
-  // Switch to the local NTP unless we're already using one.
-  if (!ntp_ || (ShouldSwitchToLocalNTP() && !ntp_->IsLocalNTP()))
+  // TODO(jeremycho): Add tests for this logic.
+  if (ShouldSwitchToLocalNTP())
     ResetNTP(false, true);
 
   scoped_ptr<content::WebContents> ntp_contents = ntp_->ReleaseContents();
 
   if (!use_local_page_only_) {
     // Preload a new Instant NTP, unless using the local NTP which is not
     // preloaded to conserve memory.
     //
     // Since this corresponds to a user action, give the remote page another
     // try, even if it's blacklisted. We don't want to blacklist pages for the
     // duration of a Browser object (for some people, that's effectively
     // "forever").
     ResetNTP(true, false);
+  } else {
+    ntp_.reset();
   }
   return ntp_contents.Pass();
 }
 
 // TODO(tonyg): This method only fires when the omnibox bounds change. It also
 // needs to fire when the overlay bounds change (e.g.: open/close info bar).
 void InstantController::SetPopupBounds(const gfx::Rect& bounds) {
   if (!extended_enabled_ && !instant_enabled_)
     return;
 
@@ skipping 36 matching lines @@
   // as it stops autocomplete. Ignore these.
   if (omnibox_focus_state_ == OMNIBOX_FOCUS_NONE)
     return;
 
   DVLOG(1) << "AutocompleteResults:";
   std::vector<InstantAutocompleteResult> results;
   for (ACProviders::const_iterator provider = providers.begin();
        provider != providers.end(); ++provider) {
     const bool from_search_provider =
         (*provider)->type() == AutocompleteProvider::TYPE_SEARCH;
-    // Unless we are talking to the local overlay, skip SearchProvider, since
-    // it only echoes suggestions.
-    if (from_search_provider &&
-        (UseInstantTabToShowSuggestions() || !overlay_->IsLocalOverlay()))
+    const bool using_local_page =
+        (instant_tab_ && instant_tab_->IsLocal()) || overlay_->IsLocal();
+    // Unless we are talking to a local page, skip SearchProvider, since it only
+    // echoes suggestions.
+    if (from_search_provider && !using_local_page)
       continue;
     // Only send autocomplete results when all the providers are done. Skip
     // this check for the SearchProvider, since it isn't done until the page
     // calls SetSuggestions (causing SearchProvider::FinalizeInstantQuery() to
     // be called), which makes it a chicken-and-egg thing.
     if (!from_search_provider && !(*provider)->done()) {
       DVLOG(1) << "Waiting for " << (*provider)->GetName();
       return;
     }
     for (ACMatches::const_iterator match = (*provider)->matches().begin();
@@ skipping 11 matching lines @@
                << result.provider << " " << result.destination_url << " '"
                << result.description << "' '" << result.search_query << "' "
                << result.transition;
       results.push_back(result);
     }
   }
   LOG_INSTANT_DEBUG_EVENT(this, base::StringPrintf(
       "HandleAutocompleteResults: total_results=%d",
       static_cast<int>(results.size())));
 
-  if (UseInstantTabToShowSuggestions())
+  if (instant_tab_)
     instant_tab_->SendAutocompleteResults(results);
   else
     overlay_->SendAutocompleteResults(results);
 }
 
 bool InstantController::OnUpOrDownKeyPressed(int count) {
   if (!extended_enabled_)
     return false;
 
   if (!instant_tab_ && !overlay_)
     return false;
 
-  if (UseInstantTabToShowSuggestions())
+  if (instant_tab_)
     instant_tab_->UpOrDownKeyPressed(count);
   else
     overlay_->UpOrDownKeyPressed(count);
 
   return true;
 }
 
 void InstantController::OnCancel(const AutocompleteMatch& match,
                                  const string16& user_text,
                                  const string16& full_text) {
   if (!extended_enabled_)
     return;
 
   if (!instant_tab_ && !overlay_)
     return;
 
   // We manually reset the state here since the JS is not expected to do it.
   // TODO(sreeram): Handle the case where user_text is now a URL
   last_match_was_search_ = AutocompleteMatch::IsSearchType(match.type) &&
                            !full_text.empty();
   last_omnibox_text_ = full_text;
   last_user_text_ = user_text;
   last_suggestion_ = InstantSuggestion();
 
   // Say |full_text| is "amazon.com" and |user_text| is "ama". This means the
   // inline autocompletion is "zon.com"; so the selection should span from
   // user_text.size() to full_text.size(). The selection bounds are inverted
   // because the caret is at the end of |user_text|, not |full_text|.
-  if (UseInstantTabToShowSuggestions()) {
+  if (instant_tab_) {
     instant_tab_->CancelSelection(user_text, full_text.size(), user_text.size(),
                                   last_verbatim_);
   } else {
     overlay_->CancelSelection(user_text, full_text.size(), user_text.size(),
                               last_verbatim_);
   }
 }
 
 void InstantController::OmniboxNavigateToURL() {
   if (!extended_enabled_)
@@ skipping 18 matching lines @@
     return false;
 
   LOG_INSTANT_DEBUG_EVENT(this, base::StringPrintf(
       "CommitIfPossible: type=%d last_omnibox_text_='%s' "
       "last_match_was_search_=%d instant_tab_=%d", type,
       UTF16ToUTF8(last_omnibox_text_).c_str(), last_match_was_search_,
       instant_tab_ != NULL));
 
   // If we are on an already committed search results page, send a submit event
   // to the page, but otherwise, nothing else to do.
-  if (UseInstantTabToShowSuggestions()) {
+  if (instant_tab_) {
     if (type == INSTANT_COMMIT_PRESSED_ENTER &&
+        !instant_tab_->IsLocal() &&
         (last_match_was_search_ ||
          last_suggestion_.behavior == INSTANT_COMPLETE_NEVER)) {
       last_suggestion_.text.clear();
       instant_tab_->Submit(last_omnibox_text_);
       instant_tab_->contents()->GetView()->Focus();
       EnsureSearchTermsAreSet(instant_tab_->contents(), last_omnibox_text_);
       return true;
     }
     return false;
   }
 
   // If the overlay is not showing at all, don't commit it.
   if (!model_.mode().is_search_suggestions())
     return false;
 
   // If the overlay is showing at full height (with results), commit it.
   // If it's showing at parial height, commit if it's navigating.
   if (!IsOverlayingSearchResults() && type != INSTANT_COMMIT_NAVIGATED)
     return false;
 
   // There may re-entrance here, from the call to browser_->CommitInstant below,
   // which can cause a TabDeactivated notification which gets back here.
   // In this case, overlay_->ReleaseContents() was called already.
   if (!GetOverlayContents())
     return false;
 
   // Never commit the local overlay.
-  if (overlay_->IsLocalOverlay())
+  if (overlay_->IsLocal())
     return false;
 
   if (type == INSTANT_COMMIT_FOCUS_LOST) {
     // Extended mode doesn't need or use the Cancel message.
     if (!extended_enabled_)
       overlay_->Cancel(last_omnibox_text_);
   } else if (type != INSTANT_COMMIT_NAVIGATED) {
     overlay_->Submit(last_omnibox_text_);
   }
 
@@ skipping 218 matching lines @@
 #if defined(USE_AURA)
   // On aura the omnibox only receives a focus lost if we initiate the focus
   // change. This does that.
   if (!model_.mode().is_default())
     browser_->InstantOverlayFocused();
 #endif
 }
 
 void InstantController::ReloadOverlayIfStale() {
   // The local overlay is never stale.
-  if (overlay_ && overlay_->IsLocalOverlay())
+  if (overlay_ && overlay_->IsLocal())
     return;
 
   // If the overlay is showing or the omnibox has focus, don't delete the
   // overlay. It will get refreshed the next time the overlay is hidden or the
   // omnibox loses focus.
   if ((!overlay_ || overlay_->is_stale()) &&
       omnibox_focus_state_ == OMNIBOX_FOCUS_NONE &&
       model_.mode().is_default()) {
     overlay_.reset();
     EnsureOverlayIsCurrent(false);
@@ skipping 169 matching lines @@
 }
 
 void InstantController::SetSuggestions(
     const content::WebContents* contents,
     const std::vector<InstantSuggestion>& suggestions) {
   LOG_INSTANT_DEBUG_EVENT(this, "SetSuggestions");
 
   // Ignore if the message is from an unexpected source.
   if (IsContentsFrom(ntp(), contents))
     return;
-  if (UseInstantTabToShowSuggestions() &&
-      !IsContentsFrom(instant_tab(), contents))
+  if (instant_tab_ && !IsContentsFrom(instant_tab(), contents))
     return;
   if (IsContentsFrom(overlay(), contents) &&
       !allow_overlay_to_show_search_suggestions_)
     return;
 
   InstantSuggestion suggestion;
   if (!suggestions.empty())
     suggestion = suggestions[0];
 
   // TODO(samarth): allow InstantTabs to call SetSuggestions() from the NTP once
   // that is better supported.
-  bool can_use_instant_tab = UseInstantTabToShowSuggestions() &&
-      search_mode_.is_search();
+  bool can_use_instant_tab = instant_tab_ && search_mode_.is_search();
   bool can_use_overlay = search_mode_.is_search_suggestions() &&
       !last_omnibox_text_.empty();
   if (!can_use_instant_tab && !can_use_overlay)
     return;
 
   if (suggestion.behavior == INSTANT_COMPLETE_REPLACE) {
     // We don't get an Update() when changing the omnibox due to a REPLACE
     // suggestion (so that we don't inadvertently cause the overlay to change
     // what it's showing, as the user arrows up/down through the page-provided
     // suggestions). So, update these state variables here.
@@ skipping 114 matching lines @@
   else if (!IsViewInContents(GetViewGainingFocus(view_gaining_focus),
                              overlay_->contents()))
     HideOverlay();
 #endif
 }
 
 void InstantController::ResetNTP(bool ignore_blacklist, bool use_local_ntp) {
   std::string instant_url;
   if (use_local_ntp ||
       !GetInstantURL(browser_->profile(), ignore_blacklist, &instant_url))
-    instant_url = chrome::kChromeSearchLocalNtpUrl;
+    instant_url = chrome::GetLocalInstantURL(browser_->profile()).spec();
   ntp_.reset(new InstantNTP(this, instant_url));
   ntp_->InitContents(browser_->profile(), browser_->GetActiveWebContents(),
                      base::Bind(&InstantController::ResetNTP,
                                 base::Unretained(this), false, false));
 }
 
 bool InstantController::EnsureOverlayIsCurrent(bool ignore_blacklist) {
   // If there's no active tab, the browser is closing.
   const content::WebContents* active_tab = browser_->GetActiveWebContents();
   if (!active_tab)
     return false;
 
   Profile* profile = Profile::FromBrowserContext(
       active_tab->GetBrowserContext());
   std::string instant_url;
   if (!GetInstantURL(profile, ignore_blacklist, &instant_url)) {
     // If we are in extended mode, fallback to the local overlay.
     if (extended_enabled_)
-      instant_url = chrome::kChromeSearchLocalOmniboxPopupURL;
+      instant_url = chrome::GetLocalInstantURL(browser_->profile()).spec();
     else
       return false;
   }
 
   if (!overlay_ || overlay_->instant_url() != instant_url)
     CreateOverlay(instant_url, active_tab);
 
   return true;
 }
 
@@ skipping 61 matching lines @@
     // Send a message asking the overlay to clear out old results.
     overlay_->Update(string16(), 0, 0, true);
   }
 
   // Clear the first interaction timestamp for later use.
   first_interaction_time_ = base::Time();
 }
 
 void InstantController::ShowOverlay(int height, InstantSizeUnits units) {
   // If we are on a committed search results page, the |overlay_| is not in use.
-  if (UseInstantTabToShowSuggestions())
+  if (instant_tab_)
     return;
 
   LOG_INSTANT_DEBUG_EVENT(this, base::StringPrintf(
       "Show: height=%d units=%d", height, units));
 
   // Must have updated omnibox after the last HideOverlay() to show suggestions.
   if (!allow_overlay_to_show_search_suggestions_)
     return;
 
   // The page is trying to hide itself. Hide explicitly (i.e., don't use
   // HideOverlay()) so that it can change its mind.
   if (height == 0) {
     model_.SetOverlayState(SearchMode(), 0, INSTANT_SIZE_PERCENT);
     return;
   }
 
   // If the overlay is being shown for the first time since the user started
   // typing, record a histogram value.
   if (!first_interaction_time_.is_null() && model_.mode().is_default()) {
     base::TimeDelta delta = base::Time::Now() - first_interaction_time_;
     UMA_HISTOGRAM_TIMES("Instant.TimeToFirstShow", delta);
   }
 
   // Show at 100% height except in the following cases:
   // - The local overlay (omnibox popup) is being loaded.
   // - Instant is disabled. The page needs to be able to show only a dropdown.
   // - The page is over a website other than search or an NTP, and is not
   //   already showing at 100% height.
-  if (overlay_->IsLocalOverlay() || !instant_enabled_ ||
+  if (overlay_->IsLocal() || !instant_enabled_ ||
       (search_mode_.is_origin_default() && !IsFullHeight(model_)))
     model_.SetOverlayState(search_mode_, height, units);
   else
     model_.SetOverlayState(search_mode_, 100, INSTANT_SIZE_PERCENT);
 
   // If the overlay is being shown at full height and the omnibox is not
   // focused, commit right away.
   if (IsFullHeight(model_) && omnibox_focus_state_ == OMNIBOX_FOCUS_NONE)
     CommitIfPossible(INSTANT_COMMIT_FOCUS_LOST);
 }
@@ skipping 48 matching lines @@
           "GetInstantURL: Instant URL blacklisted: url=%s",
           instant_url->c_str()));
       return false;
     }
   }
 
   return true;
 }
 
 void InstantController::BlacklistAndResetNTP() {
-  ++blacklisted_urls_[ntp_->instant_url()];
+  const std::string& instant_url = ntp_->instant_url();

[samarth, 2013/04/19 17:18:11]

Just chatted with Sreeram and we came up with a better fix for this. I should
just send a separate change for that though. Can you revert my changes in this
function and in the function below? You can just disable the broken test by
adding DISABLED_ at the beginning of the test name and I'll re-enable it with my
fix (please add a TODO there assigned to me to re-enable it).

[jeremycho, 2013/04/19 19:55:07]

Done.

+  ++blacklisted_urls_[instant_url];
   RecordEventHistogram(INSTANT_CONTROLLER_EVENT_URL_ADDED_TO_BLACKLIST);
   delete ntp_->ReleaseContents().release();
   MessageLoop::current()->DeleteSoon(FROM_HERE, ntp_.release());
-  ResetNTP(false, false);
+
+  // If the local NTP has crashed / not loaded too many times, wait for explicit
+  // user action before recreating it.
+  if (instant_url != chrome::GetLocalInstantURL(browser_->profile()).spec() ||
+      blacklisted_urls_[instant_url] < kMaxInstantSupportFailures)
+    ResetNTP(false, false);
 }
 
 void InstantController::BlacklistAndResetOverlay() {
-  ++blacklisted_urls_[overlay_->instant_url()];
+  const std::string& instant_url = overlay_->instant_url();
+  ++blacklisted_urls_[instant_url];
   RecordEventHistogram(INSTANT_CONTROLLER_EVENT_URL_ADDED_TO_BLACKLIST);
   HideInternal();
   delete overlay_->ReleaseContents().release();
   MessageLoop::current()->DeleteSoon(FROM_HERE, overlay_.release());
-  EnsureOverlayIsCurrent(false);
+
+  // If the local overlay has crashed / not loaded too many times, wait for
+  // explicit user action before recreating it.
+  if (instant_url != chrome::GetLocalInstantURL(browser_->profile()).spec() ||
+      blacklisted_urls_[instant_url] < kMaxInstantSupportFailures)
+    EnsureOverlayIsCurrent(false);
 }
 
 void InstantController::RemoveFromBlacklist(const std::string& url) {
   if (blacklisted_urls_.erase(url)) {
     RecordEventHistogram(INSTANT_CONTROLLER_EVENT_URL_REMOVED_FROM_BLACKLIST);
   }
 }
 
 void InstantController::StartListeningToMostVisitedChanges() {
   history::TopSites* top_sites = browser_->profile()->GetTopSites();
@@ skipping 113 matching lines @@
       // suggest 'nstant'. Otherwise, the user text really isn't a prefix, so
       // suggest nothing.
       // TODO(samarth|jered): revisit this logic. http://crbug.com/196572.
       return true;
     }
   }
 
   return false;
 }
 
-bool InstantController::UseInstantTabToShowSuggestions() const {
-  return instant_tab_ && !instant_tab_->IsLocalNTP();
-}
+bool InstantController::ShouldSwitchToLocalNTP() const {
+  if (!ntp_)
+    return true;
 
-bool InstantController::ShouldSwitchToLocalNTP() const {
+  // Don't switch if already using the correct local NTP.
+  if (ntp_->instant_url() == chrome::GetLocalInstantURL(
+          browser_->profile()).spec()) {
+    return false;
+  }
+
   // If there is no Instant URL or the NTP is stale, switch.
   std::string instant_url;
   if (!GetInstantURL(browser_->profile(), false, &instant_url) ||
       !chrome::MatchesOriginAndPath(GURL(ntp_->instant_url()),
                                     GURL(instant_url))) {
     return true;
   }
 
   if (ntp_->supports_instant())
     return false;
 
   // If this is not window startup, switch.
   // TODO(shishir): This is not completely reliable. Find a better way to detect
   // startup time.
   if (browser_->GetActiveWebContents())
     return true;
 
   return chrome::IsAggressiveLocalNTPFallbackEnabled();
 }