Put "make this my home page" link into the tip section....

chrome/browser/dom_ui/tips_handler.cc

 // Copyright (c) 2009 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 <string>
 
+#include "app/l10n_util.h"
 #include "base/string_util.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/dom_ui/tips_handler.h"
 #include "chrome/browser/profile.h"
 #include "chrome/browser/web_resource/web_resource_service.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/web_resource/web_resource_unpacker.h"
 #include "chrome/common/url_constants.h"
 #include "googleurl/src/gurl.h"
+#include "grit/generated_resources.h"
 
 DOMMessageHandler* TipsHandler::Attach(DOMUI* dom_ui) {
   dom_ui_ = dom_ui;
   tips_cache_ = dom_ui_->GetProfile()->GetPrefs()->
       GetMutableDictionary(prefs::kNTPTipsCache);
   return DOMMessageHandler::Attach(dom_ui);
 }
 
 void TipsHandler::RegisterMessages() {
   dom_ui_->RegisterMessageCallback("getTips",
       NewCallback(this, &TipsHandler::HandleGetTips));
 }
 
 void TipsHandler::HandleGetTips(const Value* content) {
-  // List containing the tips to be displayed.
+  // List containing the tips to be displayed.
   ListValue list_value;
 
   // Holds the web resource data found in the preferences cache.
   ListValue* wr_list;
 
   // These values hold the data for each web resource item.
   int current_tip_index;
   std::string current_tip;
 
   // If tips are not correct for our language, do not send.  Wait for update.
   // We need to check here because the new tab page calls for tips before
   // the tip service starts up.
   PrefService* current_prefs = dom_ui_->GetProfile()->GetPrefs();
   if (current_prefs->HasPrefPath(prefs::kNTPTipsServer)) {
     std::wstring server = current_prefs->GetString(prefs::kNTPTipsServer);
     std::wstring locale =
         ASCIIToWide(g_browser_process->GetApplicationLocale());
     if (!EndsWith(server, locale, false)) {
       dom_ui_->CallJavascriptFunction(L"tips", list_value);
       return;
     }
   }
 
   if (tips_cache_ != NULL && !tips_cache_->empty()) {
     if (tips_cache_->GetInteger(
         WebResourceService::kCurrentTipPrefName, &current_tip_index) &&
         tips_cache_->GetList(
         WebResourceService::kTipCachePrefName, &wr_list) &&
         wr_list && wr_list->GetSize() > 0) {
-      if (wr_list->GetSize() <= static_cast<size_t>(current_tip_index))
+      if (wr_list->GetSize() <= static_cast<size_t>(current_tip_index)) {
+        // Check to see whether the home page is set to NTP; if not, add tip
+        // to set home page before resetting tip index to 0.
         current_tip_index = 0;
+        if (!dom_ui_->GetProfile()->GetPrefs()->GetBoolean(
+            prefs::kHomePageIsNewTabPage)) {
+          SendTip(WideToASCII(l10n_util::GetString(
+              IDS_NEW_TAB_MAKE_THIS_HOMEPAGE)), L"set_homepage_tip",
+              current_tip_index);
+          return;
+        }
+      }
       if (wr_list->GetString(current_tip_index, &current_tip)) {
-        DictionaryValue* tip_dict = new DictionaryValue();
-        tip_dict->SetString(L"tip_html_text", current_tip);
-        list_value.Append(tip_dict);
-        tips_cache_->SetInteger(WebResourceService::kCurrentTipPrefName,
-                                current_tip_index + 1);
+        SendTip(current_tip, L"tip_html_text", current_tip_index + 1);
       }
     }
   }
+}
 
+void TipsHandler::SendTip(std::string tip, std::wstring tip_type,
+                          int tip_index) {
+  // List containing the tips to be displayed.
+  ListValue list_value;
+  DictionaryValue* tip_dict = new DictionaryValue();
+  tip_dict->SetString(tip_type, tip);
+  list_value.Append(tip_dict);
+  tips_cache_->SetInteger(WebResourceService::kCurrentTipPrefName,
+                          tip_index);
   // Send list of web resource items back out to the DOM.
   dom_ui_->CallJavascriptFunction(L"tips", list_value);
 }
 
 // static
 void TipsHandler::RegisterUserPrefs(PrefService* prefs) {
   prefs->RegisterDictionaryPref(prefs::kNTPTipsCache);
   prefs->RegisterStringPref(prefs::kNTPTipsServer,
                             WebResourceService::kDefaultResourceServer);
 }
 
 bool TipsHandler::IsValidURL(const std::wstring& url_string) {
   GURL url(WideToUTF8(url_string));
   return !url.is_empty() && (url.SchemeIs(chrome::kHttpScheme) ||
                              url.SchemeIs(chrome::kHttpsScheme));
 }