[AF][Upstream String] Add missing strings for separate button label

Added button labels in a separate CL (from CL 1610308) to merge in
asap if we want to land the separate button label implementation
on M76, since it already passes the string freeze. Will make sure
these are translated.

Bug: 961082
Change-Id: I1e927a9e19b43ac07bbc80ee880116f3b1ce231b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1625922
Commit-Queue: Siyu An <siyua@chromium.org>
Reviewed-by: Jared Saul <jsaul@google.com>
Cr-Commit-Position: refs/heads/master@{#662487}

components/autofill_payments_strings.grdp

@@ -14,6 +14,23 @@
     sign in to Chrome
   </message>
 
+  <if expr="not use_titlecase">
+    <message name="IDS_AUTOFILL_NO_THANKS_DESKTOP_LOCAL_SAVE" desc="The label for cancel button used in autofill credit card local save bubble on desktop.">
+      No thanks
+    </message>
+    <message name="IDS_AUTOFILL_NO_THANKS_DESKTOP_UPLOAD_SAVE" desc="The label for cancel button used in autofill credit card upload save bubble on desktop.">
+      No thanks
+    </message>
+  </if>
+  <if expr="use_titlecase">
+    <message name="IDS_AUTOFILL_NO_THANKS_DESKTOP_LOCAL_SAVE" desc="In Title Case: The label for cancel button used in autofill credit card local save bubble on desktop.">
+      No Thanks
+    </message>
+    <message name="IDS_AUTOFILL_NO_THANKS_DESKTOP_UPLOAD_SAVE" desc="In Title Case: The label for cancel button used in autofill credit card upload save bubble on desktop.">
+      No Thanks
+    </message>
+  </if>
+
   <!-- Autofill Credit Card Assisted Filling Infobar -->
   <if expr="is_android">
     <message name="IDS_AUTOFILL_CREDIT_CARD_FILLING_INFOBAR_TITLE" desc="Title text for the Autofill Credit Card Assisted Filling Infobar">
@@ -29,6 +46,16 @@
     <message name="IDS_AUTOFILL_CREDIT_CARD_FILLING_INFOBAR_ACCEPT" desc="Text to show for the Autofill credit card Assisted Filling infobar accept button.">
       Fill in
     </message>
+    <if expr="not use_titlecase">
+      <message name="IDS_AUTOFILL_CREDIT_CARD_FILLING_INFOBAR_NO_THANKS" desc="Text to show for the Autofill credit card Assisted Filling infobar cancel button.">
+        No thanks
+      </message>
+    </if>
+    <if expr="use_titlecase">
+      <message name="IDS_AUTOFILL_CREDIT_CARD_FILLING_INFOBAR_NO_THANKS" desc="In Title Case: Text to show for the Autofill credit card Assisted Filling infobar cancel button.">
+        No Thanks
+      </message>
+    </if>
   </if>
 
   <if expr="not is_android">
@@ -41,9 +68,25 @@
   </if>
 
   <!-- Autofill save credit card bubble or infobar prompt -->
+  <!--TODO(crbug.com/961082): Remove this once the separate label is in use. -->
   <message name="IDS_AUTOFILL_SAVE_CARD_PROMPT_ACCEPT" desc="Text to show for the Autofill save credit card prompt accept button. The prompt can be either a bubble or an infobar.">
     Save
   </message>
+  <if expr="is_android or is_ios">
+    <then>
+      <message name="IDS_AUTOFILL_SAVE_CARD_INFOBAR_ACCEPT" desc="Text to show for the Autofill save credit card infobar accept button.">
+        Save
+      </message>
+    </then>
+    <else>
+      <message name="IDS_AUTOFILL_SAVE_CARD_BUBBLE_LOCAL_SAVE_ACCEPT" desc="Text to show for the Autofill save credit card local save bubble accept button.">
+        Save
+      </message>
+      <message name="IDS_AUTOFILL_SAVE_CARD_BUBBLE_UPLOAD_SAVE_ACCEPT" desc="Text to show for the Autofill save credit card upload save bubble accept button.">
+        Save
+      </message>
+    </else>
+  </if>
   <if expr="is_android">
     <message name="IDS_AUTOFILL_SAVE_CARD_PROMPT_CONFIRM" desc="Text to show for the Autofill upload save credit card prompt accept button when more information (e.g., CVC) was needed in order to save the card and was entered." formatter_data="android_java">
       Confirm