AndroidTelemetryService: Check incognito mode based on profile

Functionally, this is a NO-OP but it does simplify the code and
eliminates the NOT_SENT_MISSING_WEB_CONTENTS scenario.

R=drubery

Bug: 938559,907280
Change-Id: Ifd3e27b865df97aa07d5a1b7653cd0f01910454a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1504958Reviewed-by: Daniel Rubery <drubery@chromium.org>
Commit-Queue: Varun Khaneja <vakh@chromium.org>
Auto-Submit: Varun Khaneja <vakh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#638351}

chrome/browser/safe_browsing/telemetry/android/android_telemetry_service.cc

@@ -129,10 +129,6 @@ void AndroidTelemetryService::OnDownloadCreated(
     return;
   }
 
-  if (item->GetMimeType() != kApkMimeType) {
-    return;
-  }
-
   if (!CanSendPing(item)) {
     return;
   }
@@ -165,13 +161,9 @@ void AndroidTelemetryService::OnDownloadUpdated(download::DownloadItem* item) {
 }
 
 bool AndroidTelemetryService::CanSendPing(download::DownloadItem* item) {
-  content::WebContents* web_contents =
-      content::DownloadItemUtils::GetWebContents(item);
-  if (!web_contents) {
-    // TODO(vakh): This can happen sometimes when a download resumes on a
-    // browser re-launch. Identify this case and document it better.
-    RecordApkDownloadTelemetryOutcome(
-        ApkDownloadTelemetryOutcome::NOT_SENT_MISSING_WEB_CONTENTS);
+  if (item->GetMimeType() != kApkMimeType) {
+    // This case is not recorded since we are not interested here in finding out
+    // how often people download non-APK files.
     return false;
   }
 
@@ -181,7 +173,7 @@ bool AndroidTelemetryService::CanSendPing(download::DownloadItem* item) {
     return false;
   }
 
-  if (web_contents->GetBrowserContext()->IsOffTheRecord()) {
+  if (profile_->IsOffTheRecord()) {
     RecordApkDownloadTelemetryOutcome(
         ApkDownloadTelemetryOutcome::NOT_SENT_INCOGNITO);
     return false;