Kaleidoscope: add "welcome" first run experience step.

Bug: b/170751292
Change-Id: I510d25920515eb568deb3f6316ae4c626950b80b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2552410
Commit-Queue: Mounir Lamouri <mlamouri@chromium.org>
Reviewed-by: Dominick Ng <dominickn@chromium.org>
Reviewed-by: Becca Hughes <beccahughes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#832220}

chrome/browser/media/kaleidoscope/kaleidoscope_metrics_recorder.cc

@@ -17,6 +17,8 @@ KaleidoscopeMetricsRecorder::FirstRunProgress MojoStepToMetricsStep(
       return KaleidoscopeMetricsRecorder::FirstRunProgress::kProviderSelection;
     case media::mojom::KaleidoscopeFirstRunExperienceStep::kMediaFeedsConsent:
       return KaleidoscopeMetricsRecorder::FirstRunProgress::kMediaFeedsConsent;
+    case media::mojom::KaleidoscopeFirstRunExperienceStep::kWelcome:
+      return KaleidoscopeMetricsRecorder::FirstRunProgress::kWelcome;
   }
   NOTREACHED();
 }

chrome/browser/media/kaleidoscope/kaleidoscope_metrics_recorder.h

@@ -18,7 +18,8 @@ class KaleidoscopeMetricsRecorder {
     kCompleted = 0,
     kProviderSelection = 1,
     kMediaFeedsConsent = 2,
-    kMaxValue = kMediaFeedsConsent,
+    kWelcome = 3,
+    kMaxValue = kWelcome,
   };
 
   KaleidoscopeMetricsRecorder();

chrome/browser/media/kaleidoscope/kaleidoscope_metrics_recorder_unittest.cc

@@ -49,6 +49,9 @@ TEST_F(KaleidoscopeMetricsRecorderTest, OnExitRecordsCurrentStep) {
   recorder().OnFirstRunExperienceStepChanged(
       media::mojom::KaleidoscopeFirstRunExperienceStep::kProviderSelection);
   ExpectFirstRunProgressTotalCount(0);
+  recorder().OnFirstRunExperienceStepChanged(
+      media::mojom::KaleidoscopeFirstRunExperienceStep::kWelcome);
+  ExpectFirstRunProgressTotalCount(0);
   recorder().OnFirstRunExperienceStepChanged(
       media::mojom::KaleidoscopeFirstRunExperienceStep::kMediaFeedsConsent);
   ExpectFirstRunProgressTotalCount(0);

chrome/browser/media/kaleidoscope/mojom/kaleidoscope.mojom

@@ -44,6 +44,7 @@ enum KaleidoscopeFirstRunExperienceStep {
   kCompleted,
   kProviderSelection,
   kMediaFeedsConsent,
+  kWelcome,
 };
 
 // Provides data for the kaleidoscope page.

tools/metrics/histograms/enums.xml

@@ -39759,6 +39759,7 @@ Called by update_gpu_driver_bug_workaround_entries.py.-->
   <int value="0" label="Completed"/>
   <int value="1" label="Provider Selection"/>
   <int value="2" label="Media Feeds Consent"/>
+  <int value="3" label="Welcome Screen"/>
 </enum>
 
 <enum name="KaleidoscopeNavigation">