[Search] Make the feature name link to a learn more screen in the first-run experience.

chrome/app/chromium_strings.grd

Index: chrome/app/chromium_strings.grd
diff --git a/chrome/app/chromium_strings.grd b/chrome/app/chromium_strings.grd
index 17feb6091943583e5e759df5b14404e9d5500e7f..be27d0f0bd8c226d90e077a1027849b3cb32da3a 100644
--- a/chrome/app/chromium_strings.grd
+++ b/chrome/app/chromium_strings.grd
@@ -1205,8 +1205,14 @@ Signing in anyway will merge Chromium information like bookmarks, history, and o
       <message name="IDS_CONTEXTUAL_SEARCH_HEADER" desc="Header shown at the top of the first run experience, to describe the Contextual Search feature.">
         Search with one touch
       </message>
-      <message name="IDS_CONTEXTUAL_SEARCH_PROMO_DESCRIPTION" desc="Description of the Contextual Search feature.">
-        Using “Touch to Search” you can touch any word on a website to learn more about a topic. Chromium will send that word and the surrounding contents to Google and bring back relevant information about it.
+      <message name="IDS_CONTEXTUAL_SEARCH_PROMO_DESCRIPTION_1" desc="Part 1 of the description of the Contextual Search feature. Combined with FEATURE_NAME and DESCRIPTION_2 below, the whole should be a paragraph describing the feature. This line can be empty if it makes sense to start the sentence with FEATURE_NAME.">
+        Learn about topics on websites without leaving your browser.
+      </message>
+      <message name="IDS_CONTEXTUAL_SEARCH_PROMO_FEATURE_NAME" desc="Name of the Contextual Search feature. See explanation in DESCRIPTION_1.">
+        Tap to Search
+      </message>
+      <message name="IDS_CONTEXTUAL_SEARCH_PROMO_DESCRIPTION_2" desc="Part 2 of the description of the Contextual Search feature. See explanation in DESCRIPTION_1.">
+        sends a word and its surrounding context to Google Search, returning definitions, pictures, search results, and other details.
       </message>
       <message name="IDS_CONTEXTUAL_SEARCH_PROMO_OPTIN" desc="Text for the button the user clicks to opt in.">
         Accept &amp; Search