Add NTP/TabSwitcher IPH strings.

Bug: 1116201
Change-Id: Ib4664f4dcc78380da556cb89e2ad4c544e4de312
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2366572
Commit-Queue: Theresa  <twellington@chromium.org>
Reviewed-by: Theresa  <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#800119}

chrome/android/expectations/lint-suppressions.xml

@@ -370,6 +370,13 @@ Still reading?
     <ignore regexp="The resource `R.string.most_visited_tiles_header` appears to be unused"/>
     <!-- 1: Some strings in components_strings_grd are not used in other targets. -->
     <ignore regexp="webview_.*__lint.*components_strings_grd"/>
+    <!-- 6: Temporarily suppress until implementation is ready, see https://crbug.com/1116201-->
+    <ignore regexp="The resource `R.string.iph_ntp_without_feed_text` appears to be unused"/>
+    <ignore regexp="The resource `R.string.iph_ntp_without_feed_accessibility_text` appears to be unused"/>
+    <ignore regexp="The resource `R.string.iph_ntp_with_feed_text` appears to be unused"/>
+    <ignore regexp="The resource `R.string.iph_ntp_with_feed_accessibility_text` appears to be unused"/>
+    <ignore regexp="The resource `R.string.iph_tab_switcher_text` appears to be unused"/>
+    <ignore regexp="The resource `R.string.iph_tab_switcher_accessibility_text` appears to be unused"/>
     <!-- Endnote: Please specify number of suppressions when adding more -->
   </issue>
   <issue id="UsableSpace">

chrome/browser/ui/android/strings/android_chrome_strings.grd

@@ -3547,12 +3547,30 @@ To change this setting, <ph name="BEGIN_LINK">&lt;resetlink&gt;</ph>reset sync<p
       <message name="IDS_IPH_IDENTITY_DISC_ACCESSIBILITY_TEXT" desc="The in-product-help accessibility text prompting the user that tapping identity disc will navigate to 'Sync and Google services' settings page.">
         To manage your Google account, tap the "Manage account" button
       </message>
+      <message name="IDS_IPH_NTP_WITHOUT_FEED_TEXT" desc="The in-product-help message to open the new tab page with personalized top sites.">
+        See your top sites
+      </message>
+      <message name="IDS_IPH_NTP_WITHOUT_FEED_ACCESSIBILITY_TEXT" desc="The in-product-help accessibility text to open the new tab page with personalized top sites. The 'Home' button name should match TC ID 2821179408673282599.">
+        To see your top sites, tap the Home button
+      </message>
+      <message name="IDS_IPH_NTP_WITH_FEED_TEXT" desc="The in-product-help message to open the new tab page with personalized top sites and stories.">
+        See top sites and stories for you
+      </message>
+      <message name="IDS_IPH_NTP_WITH_FEED_ACCESSIBILITY_TEXT" desc="The in-product-help accessibility text to open the new tab page with personalized top sites and stories. The 'Home' button name should match TC ID 2821179408673282599.">
+        To see top sites and stories for you, tap the Home button
+      </message>
       <message name="IDS_IPH_PREVIEWS_OMNIBOX_UI_TEXT" desc="The in-product-help text informing the user that the displayed page was modified to make it load faster or use less data. Prompts the user to tap the message and load the original, unaltered, page if they would like. The 'Lite page provided by Google.' sentence should match TC ID 373879247902731825">
         Lite page provided by Google. Tap to load the original.
       </message>
       <message name="IDS_IPH_PREVIEWS_OMNIBOX_UI_ACCESSIBILITY_TEXT" desc="The in-product-help text informing the user that the displayed page was modified to make it load faster or use less data. Prompts the user to tap the message and load the original, unaltered, page if they would like. The 'Lite page provided by Google.' sentence should match TC ID 373879247902731825">
         Lite page provided by Google. Tap the load original button to load the original page.
       </message>
+      <message name="IDS_IPH_TAB_SWITCHER_TEXT" desc="The in-product-help message to open the tab switcher.">
+        Open tabs to visit different pages at the same time
+      </message>
+      <message name="IDS_IPH_TAB_SWITCHER_ACCESSIBILITY_TEXT" desc="The in-product-help accessibility text to open the new tab page. The 'open tabs' button name should match TC 3108541343994525384">
+        To open tabs and visit different pages at the same time, tap the open tabs button
+      </message>
       <message name="IDS_IPH_TRANSLATE_MENU_BUTTON_TEXT" desc="The in-product-help message after a successful navigation prompting user to translate current page.">
         Translate this page to any language
       </message>

chrome/browser/ui/android/strings/android_chrome_strings_grd/IDS_IPH_NTP_WITHOUT_FEED_ACCESSIBILITY_TEXT.png.sha1

+dc228c1d5e7354bc67b6de67dd71e4d06fde7b56
\ No newline at end of file

chrome/browser/ui/android/strings/android_chrome_strings_grd/IDS_IPH_NTP_WITHOUT_FEED_TEXT.png.sha1

+f80463ad536bcdcaed95ae6c49f12e86d53ea466
\ No newline at end of file

chrome/browser/ui/android/strings/android_chrome_strings_grd/IDS_IPH_NTP_WITH_FEED_ACCESSIBILITY_TEXT.png.sha1

+afd7c4b6a4753c1691e2480bbc87fe7ad6f885c3
\ No newline at end of file

chrome/browser/ui/android/strings/android_chrome_strings_grd/IDS_IPH_NTP_WITH_FEED_TEXT.png.sha1

+e0c87de9561aa3c57fcc11c659c93dd63697ce4f
\ No newline at end of file

chrome/browser/ui/android/strings/android_chrome_strings_grd/IDS_IPH_TAB_SWITCHER_ACCESSIBILITY_TEXT.png.sha1

+3b2ac4665fca095e2265cc575cb2edf88c5ee701
\ No newline at end of file

chrome/browser/ui/android/strings/android_chrome_strings_grd/IDS_IPH_TAB_SWITCHER_TEXT.png.sha1

+cf56fcb633510b1c7e02c9e769c8e09c956b544b
\ No newline at end of file