Added more VLOGs for crash consent

Added some VLOG messages to
ChromeCrashReporterClient::GetCollectStatsConsent to explain why it is
returning false. Crash-related tests on ChromeOS have been flaky; this
is part of understanding why.

BUG=chromium:994987,chromium:984807
TEST=Ran Chrome with and without consent, and Chromium with and without
consent. Ensured crash dumps produced only for Chrome with consent, and
that (with --vmodule=chrome_crash_reporter_client=1), expected messages
were generated.

Change-Id: Iecf77fd78a7aee0c5eb2ba852ad576d84cac6b71
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1833929Reviewed-by: Robert Sesek <rsesek@chromium.org>
Commit-Queue: Ian Barkley-Yeung <iby@chromium.org>
Cr-Commit-Position: refs/heads/master@{#702130}

chrome/app/chrome_crash_reporter_client.cc

@@ -164,8 +164,12 @@ bool ChromeCrashReporterClient::GetCollectStatsConsent() {
   bool is_stable_channel =
       chrome::GetChannel() == version_info::Channel::STABLE;
 
-  if (is_guest_session && is_stable_channel)
+  if (is_guest_session && is_stable_channel) {
+    VLOG(1) << "GetCollectStatsConsent(): is_guest_session " << is_guest_session
+            << " && is_stable_channel " << is_stable_channel
+            << " so returning false";
     return false;
+  }
 #endif  // defined(OS_CHROMEOS)
 
 #if defined(OS_ANDROID)
@@ -174,8 +178,15 @@ bool ChromeCrashReporterClient::GetCollectStatsConsent() {
   // do not upload them.
   return is_official_chrome_build;
 #else  // !defined(OS_ANDROID)
-  return is_official_chrome_build &&
-      GoogleUpdateSettings::GetCollectStatsConsent();
+  if (!is_official_chrome_build) {
+    VLOG(1) << "GetCollectStatsConsent(): is_official_chrome_build is false "
+            << "so returning false";
+    return false;
+  }
+  bool settings_consent = GoogleUpdateSettings::GetCollectStatsConsent();
+  VLOG(1) << "GetCollectStatsConsent(): settings_consent: " << settings_consent
+          << " so returning that";
+  return settings_consent;
 #endif  // defined(OS_ANDROID)
 }