DPWA: fix UMA metrics name for WebApp.Launcher.

Fix the code to use WebApp.Launcher.LaunchResult and
WebApp.Launcher.UpdateResult to match the ones in histograms.xml

Bug: none
Change-Id: Iece91aa20d3614ff2d711d7c765ec0837a63c23f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2341845
Commit-Queue: Phillis Tang <phillis@chromium.org>
Reviewed-by: Daniel Murphy <dmurph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#796087}

chrome/browser/web_applications/chrome_pwa_launcher/launcher_log_reporter.cc

@@ -20,7 +20,7 @@ void RecordPwaLauncherResult() {
         result >= 0 &&
         result <= static_cast<DWORD>(WebAppLauncherLaunchResult::kMaxValue)) {
       base::UmaHistogramEnumeration(
-          "WebApp.Launcher.WebAppLauncherLaunchResult",
+          "WebApp.Launcher.LaunchResult",
           static_cast<WebAppLauncherLaunchResult>(result));
     }
 

chrome/browser/web_applications/chrome_pwa_launcher/launcher_log_unittest.cc

@@ -65,8 +65,8 @@ TEST_F(WebAppLauncherLogTest, RecordPwaLauncherResult) {
   RecordPwaLauncherResult();
 
   // |expected_value| should have been recorded to UMA.
-  histogram_tester.ExpectUniqueSample(
-      "WebApp.Launcher.WebAppLauncherLaunchResult", expected_value, 1);
+  histogram_tester.ExpectUniqueSample("WebApp.Launcher.LaunchResult",
+                                      expected_value, 1);
 
   // PWALauncherResult should have been deleted from the registry.
   EXPECT_FALSE(key_.HasValue(kPwaLauncherResult));

chrome/browser/web_applications/chrome_pwa_launcher/launcher_update.cc

@@ -50,8 +50,7 @@ void DeleteHardLinkOrCopyCallback(const base::FilePath& launcher_path,
 }
 
 void RecordWebAppLauncherUpdateResult(WebAppLauncherUpdateResult result) {
-  base::UmaHistogramEnumeration("WebApp.Launcher.WebAppLauncherUpdateResult",
-                                result);
+  base::UmaHistogramEnumeration("WebApp.Launcher.UpdateResult", result);
 }
 
 // Replaces |launcher_path| with the one at |latest_version_path|. This is done