Add Chrome branded control flow for tests and remove installer strings

Added the chrome branded conditional statement to make sure the test
runs with chrome strings and this will remove the need for having
chromium strings. They are being removed in this cl.

Bug: 412697757
Change-Id: Ie84ce6b082bad52d4bc3ab6c7fd5232f620a3072
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6513545
Reviewed-by: Kaan Alsan <alsan@chromium.org>
Commit-Queue: Muhammad Salmaan <musalmaan@chromium.org>
Reviewed-by: Ian Clelland <iclelland@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1456963}

chrome/app/chromium_strings.grd

@@ -1013,17 +1013,6 @@ Chromium is unable to recover your settings.
         </message>
       </if>
 
-      <!-- Installer Downloader infobar -->
-      <message name="IDS_INSTALLER_DOWNLOADER_DISCLAIMER" desc=" Installer downloader infobar message for downloading the Chromium installer." translateable="false">
-        Download the Chromium Installer.
-      </message>
-      <message name="IDS_INSTALLER_DOWNLOADER_LINK_TEXT" desc="Link text for the installer downloader infobar, 'Learn More'."  translateable="false">
-        Learn More
-      </message>
-      <message name="IDS_INSTALLER_DOWNLOADER_BUTTON_LABEL" desc="Button label for the installer downloader infobar to download the Chromium installer."  translateable="false">
-        Download Chromium Installer
-      </message>
-
       <!-- Enterprise sign-in dialog -->
       <message name="IDS_ENTERPRISE_VALUE_PROPOSITION_PROFILE_REQUIRED_BY_ORG_TITLE" desc="Title of the screen in the profile creation flow where the user is asked whether they want to confirm signing in to Chromium with their enterprise account when it is mandatory to sign in to Chromium with the enterprise account.">
         Your organization requires you to sign into Chromium

chrome/browser/ui/BUILD.gn

@@ -1970,7 +1970,7 @@ static_library("ui") {
       allow_circular_includes_from += [ "//chrome/browser/ui/find_bar:impl" ]
     }
 
-    if (is_win) {
+    if (is_win && is_chrome_branded) {
       sources += [
         "startup/installer_downloader/installer_downloader_infobar_delegate.cc",
         "startup/installer_downloader/installer_downloader_infobar_delegate.h",

chrome/test/BUILD.gn

@@ -7158,7 +7158,6 @@ test("unit_tests") {
       "../browser/task_manager/sampling/shared_sampler_win_unittest.cc",
       "../browser/tracing/windows_system_tracing_client_impl_unittest_win.cc",
       "../browser/ui/startup/credential_provider_signin_info_fetcher_win_unittest.cc",
-      "../browser/ui/startup/installer_downloader/installer_downloader_infobar_delegate_unittest.cc",
       "../browser/ui/views/frame/windows_caption_button_unittest.cc",
       "../browser/ui/views/uninstall_view_unittest.cc",
       "../browser/ui/webui/version/version_handler_win_unittest.cc",
@@ -7247,6 +7246,7 @@ test("unit_tests") {
     if (is_chrome_branded) {
       sources += [
         "../browser/component_updater/recovery_improved_component_unittest.cc",
+        "../browser/ui/startup/installer_downloader/installer_downloader_infobar_delegate_unittest.cc",
       ]
 
       data_deps +=