[webui][ntp] Log WebUINTP_LinkOpenedFromContextMenu

NewTabPage.LinkOpenedFromContextMenu.WebUI is the WebUI equivalent of
NTP_LinkOpenedFromContextMenu and MostVisited_ClickedFromContextMenu on
the local NTP.

+ Update ownership of the three aforementioned user actions.

Bug: 1074060
Change-Id: I59e412ad48894cefc1d7bc3dd599ee45c072d62d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2208183
Commit-Queue: Tibor Goldschwendt <tiborg@chromium.org>
Commit-Queue: Ilya Sherman <isherman@chromium.org>
Auto-Submit: Tibor Goldschwendt <tiborg@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Cr-Commit-Position: refs/heads/master@{#770331}

chrome/browser/renderer_context_menu/render_view_context_menu.cc

@@ -990,6 +990,11 @@ void RenderViewContextMenu::RecordUsedItem(int id) {
     } else if (doc_url.GetOrigin() == chrome::kChromeSearchMostVisitedUrl) {
       base::RecordAction(
           base::UserMetricsAction("MostVisited_ClickedFromContextMenu"));
+    } else if (doc_url.GetOrigin() == GURL(chrome::kChromeUINewTabPageURL) ||
+               doc_url.GetOrigin() ==
+                   GURL(chrome::kChromeUIUntrustedNewTabPageUrl)) {
+      base::RecordAction(base::UserMetricsAction(
+          "NewTabPage.LinkOpenedFromContextMenu.WebUI"));
     }
   }
 

tools/metrics/actions/actions.xml

@@ -14954,9 +14954,10 @@ should be able to be added at any place in this file.
 </action>
 
 <action name="MostVisited_ClickedFromContextMenu">
-  <owner>dbeam@chromium.org</owner>
-  <owner>kristipark@chromium.org</owner>
+  <owner>tiborg@chromium.org</owner>
+  <owner>yyushkina@chromium.org</owner>
   <owner>chrome-analysis-team@google.com</owner>
+  <owner>chrome-desktop-ntp@google.com</owner>
   <description>
     An NTP tile was opened from the context menu. Desktop only.
 
@@ -15227,6 +15228,23 @@ should be able to be added at any place in this file.
   <description>Please enter the description of this user action.</description>
 </action>
 
+<action name="NewTabPage.LinkOpenedFromContextMenu.WebUI">
+  <owner>tiborg@chromium.org</owner>
+  <owner>yyushkina@chromium.org</owner>
+  <owner>chrome-analysis-team@google.com</owner>
+  <owner>chrome-desktop-ntp@google.com</owner>
+  <description>
+    Recorded when a link on the WebUI New Tab Page is opened via the context
+    menu. This can include: Middle-slot promos, Doodles, the One Google Bar,
+    shortcuts and custom background image attributions. Logged only when Google
+    is the default search provider, as these elements only appear on the Google
+    NTP.
+
+    This user action is of special interest to the chrome-analysis-team@. Do not
+    change its semantics or retire it without talking to them first.
+  </description>
+</action>
+
 <action name="NewTabPage_ContentSuggestions_ArticlesUsage"
     not_user_triggered="true">
   <owner>markusheintz@chromium.org</owner>
@@ -15418,9 +15436,10 @@ should be able to be added at any place in this file.
 </action>
 
 <action name="NTP_LinkOpenedFromContextMenu">
-  <owner>kmilka@chromium.org</owner>
-  <owner>ramyan@chromium.org</owner>
+  <owner>tiborg@chromium.org</owner>
+  <owner>yyushkina@chromium.org</owner>
   <owner>chrome-analysis-team@google.com</owner>
+  <owner>chrome-desktop-ntp@google.com</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