Show NTP at startup: activates the same behaviour also in desktop platforms

 .../browser/ChromeInactivityTracker.java      | 14 ++++++++

 .../chrome/browser/ChromeTabbedActivity.java  |  2 ++

 .../browser/tasks/ReturnToChromeUtil.java     | 16 ++++++++-

 chrome/app/settings_strings.grdp              |  2 +-

 .../flags/android/chrome_feature_list.cc      |  1 +

 .../cromite/sShowNtpAtStartupAndroid.java     | 33 +++++++++++++++++++

 .../preferences/ChromePreferenceKeys.java     |  2 ++

 .../LegacyChromePreferenceKeys.java           |  1 +

 .../on_startup_page/on_startup_page.ts        |  4 +--

 chrome/browser/sessions/tab_loader.cc         |  2 +-

 .../res/layout/single_tab_module_layout.xml   | 12 +++----

 .../SingleTabSwitcherCoordinator.java         |  2 +-

 .../SingleTabSwitcherOnNtpMediator.java       |  5 +--

 .../show-ntp-at-startup.grdp                  |  9 +++++

 .../startup/startup_browser_creator_impl.cc   |  8 +++++

 .../about_flags_cc/show-ntp-at-startup.inc    | 12 +++++++

 .../show-ntp-at-startup.inc                   |  5 +++

 .../show-ntp-at-startup.inc                   |  1 +

 16 files changed, 112 insertions(+), 10 deletions(-)

 20 files changed, 124 insertions(+), 14 deletions(-)

 create mode 100644 chrome/browser/flags/android/java/src/org/chromium/chrome/browser/flags/cromite/sShowNtpAtStartupAndroid.java

 create mode 100644 chrome/browser/ui/android/strings/cromite_android_chrome_strings_grd/show-ntp-at-startup.grdp

 create mode 100644 cromite_flags/chrome/browser/about_flags_cc/show-ntp-at-startup.inc

             return false;

         }

diff --git a/chrome/app/settings_strings.grdp b/chrome/app/settings_strings.grdp

--- a/chrome/app/settings_strings.grdp

+++ b/chrome/app/settings_strings.grdp

@@ -1079,7 +1079,7 @@

     Open a specific page or set of pages

   </message>

   <message name="IDS_SETTINGS_ON_STARTUP_CONTINUE_AND_OPEN_SPECIFIC" desc="Radio button option to continue where you left off and open a specific set of pages.">

-    Continue where you left off and open a specific set of pages

+    Continue where you left off and open a New Tab page

   </message>

   <message name="IDS_SETTINGS_ON_STARTUP_USE_CURRENT" desc="Button to use current pages.">

     Use current pages

diff --git a/chrome/browser/flags/android/chrome_feature_list.cc b/chrome/browser/flags/android/chrome_feature_list.cc

--- a/chrome/browser/flags/android/chrome_feature_list.cc

+++ b/chrome/browser/flags/android/chrome_feature_list.cc

@@ -335,6 +335,7 @@ const base::Feature* const kFeaturesExposedToJava[] = {

@@ -334,6 +334,7 @@ const base::Feature* const kFeaturesExposedToJava[] = {

     &kSearchInCCT,

     &kSearchInCCTAlternateTapHandling,

     &kSearchResumptionModuleAndroid,

                 ChromePreferenceKeys.TABMODEL_ACTIVE_TAB_ID,

                 ChromePreferenceKeys.TABMODEL_HAS_COMPUTED_MAX_ID,

                 ChromePreferenceKeys.TABMODEL_HAS_RUN_FILE_MIGRATION,

diff --git a/chrome/browser/resources/settings/on_startup_page/on_startup_page.ts b/chrome/browser/resources/settings/on_startup_page/on_startup_page.ts

--- a/chrome/browser/resources/settings/on_startup_page/on_startup_page.ts

+++ b/chrome/browser/resources/settings/on_startup_page/on_startup_page.ts

@@ -81,8 +81,7 @@ export class SettingsOnStartupPageElement extends

    *     pages" is selected.

    */

   private showStartupUrls_(restoreOnStartup: PrefValues): boolean {

-    return restoreOnStartup === PrefValues.OPEN_SPECIFIC ||

-        restoreOnStartup === PrefValues.CONTINUE_AND_OPEN_SPECIFIC;

+    return restoreOnStartup === PrefValues.OPEN_SPECIFIC;

   }

   /**

@@ -93,6 +92,7 @@ export class SettingsOnStartupPageElement extends

    */

   private showContinueAndOpenSpecific_(pref: chrome.settingsPrivate.PrefObject):

       boolean {

+    if ((true)) return true;

     return pref.enforcement === chrome.settingsPrivate.Enforcement.ENFORCED ||

         pref.enforcement === chrome.settingsPrivate.Enforcement.RECOMMENDED;

   }

diff --git a/chrome/browser/sessions/tab_loader.cc b/chrome/browser/sessions/tab_loader.cc

--- a/chrome/browser/sessions/tab_loader.cc

+++ b/chrome/browser/sessions/tab_loader.cc

@@ -52,7 +52,7 @@ struct ScoredTabComparator {

 };

 // Testing seams.

-size_t g_max_loaded_tab_count_for_testing = 0;

+size_t g_max_loaded_tab_count_for_testing = 1;

 base::RepeatingCallback<void(TabLoader*)>* g_construction_callback = nullptr;

 // Determines if the given browser (can be null) is closing.

diff --git a/chrome/browser/single_tab/android/java/res/layout/single_tab_module_layout.xml b/chrome/browser/single_tab/android/java/res/layout/single_tab_module_layout.xml

--- a/chrome/browser/single_tab/android/java/res/layout/single_tab_module_layout.xml

+++ b/chrome/browser/single_tab/android/java/res/layout/single_tab_module_layout.xml

+        Enable showing a NewTabPage at startup and allows selection of the last open tab

+    </message>

+</grit-part>

diff --git a/chrome/browser/ui/startup/startup_browser_creator_impl.cc b/chrome/browser/ui/startup/startup_browser_creator_impl.cc

--- a/chrome/browser/ui/startup/startup_browser_creator_impl.cc

+++ b/chrome/browser/ui/startup/startup_browser_creator_impl.cc

@@ -536,6 +536,14 @@ StartupBrowserCreatorImpl::DetermineStartupTabs(

       AppendTabs(provider.GetNewTabPageTabs(*command_line_, profile_), &tabs);

     }

+    SessionStartupPref session_startup_pref =

+          SessionStartupPref::GetStartupPref(profile_);

+    if (session_startup_pref.type == SessionStartupPref::LAST_AND_URLS) {

+      StartupTabs new_tabs;

+      new_tabs.emplace_back(GURL(chrome::kChromeUINewTabURL));

+      AppendTabs(new_tabs, &tabs);

+    }

+

     // Potentially add a tab appropriate to display the Privacy Sandbox

     // confirmaton dialog on top of. Ideally such a tab will already exist

     // in |tabs|, and no additional tab will be required.

diff --git a/cromite_flags/chrome/browser/about_flags_cc/show-ntp-at-startup.inc b/cromite_flags/chrome/browser/about_flags_cc/show-ntp-at-startup.inc

new file mode 100644

--- /dev/null