media: Add Permissions.Action.ProtectedMedia UMA on ChromeOS

chrome/browser/media/protected_media_identifier_permission_context.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/media/protected_media_identifier_permission_context.h"
 
 #include "base/command_line.h"
 #include "base/metrics/user_metrics.h"
 #include "build/build_config.h"
 #include "chrome/browser/content_settings/tab_specific_content_settings.h"
 #include "chrome/browser/permissions/permission_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/pref_names.h"
 #include "components/prefs/pref_service.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/web_contents.h"
 #if defined(OS_CHROMEOS)
 #include <utility>
 
+#include "base/metrics/histogram_macros.h"
 #include "chrome/browser/chromeos/attestation/platform_verification_dialog.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "chromeos/chromeos_switches.h"
 #include "chromeos/settings/cros_settings_names.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "components/user_prefs/user_prefs.h"
 #include "ui/views/widget/widget.h"
 #elif !defined(OS_ANDROID)
 #error This file currently only supports Chrome OS and Android.
 #endif
@@ skipping 148 matching lines @@
     DVLOG(1) << "Protected media identifier disabled by the user or by device "
                 "policy.";
     return false;
   }
 #endif
 
   return true;
 }
 
 #if defined(OS_CHROMEOS)
+
+static void ReportPermissionActionUMA(PermissionAction action) {
+  UMA_HISTOGRAM_ENUMERATION("Permissions.Action.ProtectedMedia", action,
+                            PermissionAction::NUM);
+}
+
 void ProtectedMediaIdentifierPermissionContext::
     OnPlatformVerificationConsentResponse(
         content::WebContents* web_contents,
         const PermissionRequestID& id,
         const GURL& requesting_origin,
         const GURL& embedding_origin,
         const BrowserPermissionCallback& callback,
         PlatformVerificationDialog::ConsentResponse response) {
   // The request may have been canceled. Drop the callback in that case.
+  // This can happen if the tab is closed.
   PendingRequestMap::iterator request = pending_requests_.find(web_contents);
-  if (request == pending_requests_.end())
+  if (request == pending_requests_.end()) {
+    VLOG(1) << "Platform verification ignored by user.";
+    ReportPermissionActionUMA(PermissionAction::IGNORED);
     return;
+  }
 
   DCHECK(request->second.second == id);
   pending_requests_.erase(request);
 
   ContentSetting content_setting = CONTENT_SETTING_ASK;
   bool persist = false; // Whether the ContentSetting should be saved.
   switch (response) {
     case PlatformVerificationDialog::CONSENT_RESPONSE_NONE:
+      // This can happen if user clicked "x", or pressed "Esc", or navigated
+      // away without closing the tab.
       VLOG(1) << "Platform verification dismissed by user.";
+      ReportPermissionActionUMA(PermissionAction::DISMISSED);
       content_setting = CONTENT_SETTING_ASK;
       persist = false;
       break;
     case PlatformVerificationDialog::CONSENT_RESPONSE_ALLOW:
       VLOG(1) << "Platform verification accepted by user.";
       base::RecordAction(
           base::UserMetricsAction("PlatformVerificationAccepted"));
+      ReportPermissionActionUMA(PermissionAction::GRANTED);
       content_setting = CONTENT_SETTING_ALLOW;
       persist = true;
       break;
     case PlatformVerificationDialog::CONSENT_RESPONSE_DENY:
       VLOG(1) << "Platform verification denied by user.";
       base::RecordAction(
           base::UserMetricsAction("PlatformVerificationRejected"));
+      ReportPermissionActionUMA(PermissionAction::DENIED);
       content_setting = CONTENT_SETTING_BLOCK;
       persist = true;
       break;
   }
 
   NotifyPermissionSet(
       id, requesting_origin, embedding_origin, callback,
       persist, content_setting);
 }
 #endif