[NTP] Log links opened via the context menu on the NTP.

Log links opened from the Most Visited iframe (shortcuts) in
MostVisited_Clicked. Log links open from elsewhere on the local NTP
in NTP_LinkOpenedFromContextMenu.

Bug: 951892, 961477
Change-Id: I961963c3f97d830dbe4ed3e6eaeb1459337bc3af
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1640608
Commit-Queue: Kyle Milka <kmilka@chromium.org>
Reviewed-by: Mark Pearson <mpearson@chromium.org>
Reviewed-by: Kristi Park <kristipark@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#668530}

chrome/browser/renderer_context_menu/render_view_context_menu.cc

@@ -979,6 +979,12 @@ void RenderViewContextMenu::RecordUsedItem(int id) {
     } else if (doc_url == GURL(chrome::kChromeUIDownloadsURL)) {
       base::RecordAction(base::UserMetricsAction(
           "Downloads_OpenUrlOfDownloadedItemFromContextMenu"));
+    } else if (doc_url == GURL(chrome::kChromeSearchLocalNtpUrl)) {
+      base::RecordAction(
+          base::UserMetricsAction("NTP_LinkOpenedFromContextMenu"));
+    } else if (doc_url.GetOrigin() == chrome::kChromeSearchMostVisitedUrl) {
+      base::RecordAction(
+          base::UserMetricsAction("MostVisited_ClickedFromContextMenu"));
     }
   }
 

tools/metrics/actions/actions.xml

@@ -13138,6 +13138,14 @@ should be able to be added at any place in this file.
   <description>An NTP tile was clicked. Desktop only.</description>
 </action>
 
+<action name="MostVisited_ClickedFromContextMenu">
+  <owner>dbeam@chromium.org</owner>
+  <owner>kristipark@chromium.org</owner>
+  <description>
+    An NTP tile was opened from the context menu. Desktop only.
+  </description>
+</action>
+
 <action name="MostVisited_UrlBlacklisted">
   <owner>sfiera@chromium.org</owner>
   <owner>treib@chromium.org</owner>
@@ -13510,6 +13518,18 @@ should be able to be added at any place in this file.
   <description>Recorded when the NPAPI removal infobar is shown.</description>
 </action>
 
+<action name="NTP_LinkOpenedFromContextMenu">
+  <owner>kmilka@chromium.org</owner>
+  <owner>ramyan@chromium.org</owner>
+  <description>
+    Recorded when a link on the New Tab Page is opened via the context menu.
+    This can include: Middle-slot promos, Doodles, the One Google Bar, and
+    custom background image attributions, but *not* shortcuts. For shortcuts see
+    MostVisited_Clicked. Logged only when Google is the default search provider,
+    as these elements only appear on the Google NTP.
+  </description>
+</action>
+
 <action name="NTPPromoClosed">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>