Quick Answers: Add context menu baseline metrics

Bug: b/170769672
Test: None
Change-Id: I482d2812b1191df2b5a35a7c57024dadc3f87a99
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2487561
Commit-Queue: Yue Li <updowndota@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Cr-Commit-Position: refs/heads/master@{#824355}

chrome/browser/renderer_context_menu/quick_answers_menu_observer.cc

@@ -8,6 +8,7 @@
 
 #include "ash/public/cpp/assistant/controller/assistant_interaction_controller.h"
 #include "ash/public/cpp/quick_answers/controller/quick_answers_controller.h"
+#include "base/metrics/histogram_functions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
@@ -111,6 +112,9 @@ void QuickAnswersMenuObserver::OnContextMenuViewBoundsChanged(
 }
 
 void QuickAnswersMenuObserver::OnMenuClosed() {
+  base::UmaHistogramBoolean("QuickAnswers.ContextMenu.Close",
+                            is_other_command_executed_);
+
   if (!quick_answers_controller_)
     return;
 

tools/metrics/histograms/histograms_xml/assistant/histograms.xml

@@ -281,6 +281,19 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
   </summary>
 </histogram>
 
+<histogram name="QuickAnswers.ContextMenu.Close" enum="BooleanClicked"
+    expires_after="2021-02-14">
+  <owner>updowndota@google.com</owner>
+  <owner>croissant-eng@chromium.org</owner>
+  <summary>
+    Records whether or not the user interacted (via clicking) with a context
+    menu, whether or not that menu included any Quick Answers. Recorded when the
+    menu is closed. This metric can be used as a baseline for Quick Answers
+    engagement metrics, which record whether users click on context menus that
+    *do* include a Quick Answers card. Recorded on ChromeOS only.
+  </summary>
+</histogram>
+
 <histogram name="QuickAnswers.Intent" enum="QuickAnswersIntentType"
     expires_after="2021-04-25">
   <owner>llin@google.com</owner>