[WebAPK] Collect RequestTokenDurationV2 for new webapks.

WebAPKs using the new minting mechanism, identified by their package
name, should have a separate latency histogram to track if overall
latency will be affected.

Bug: 1134173
Change-Id: Ib75ec57828c1df1f038c2a1bf383a52cc602647f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2443011Reviewed-by: Glenn Hartmann <hartmanng@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Peter Kotwicz <pkotwicz@chromium.org>
Commit-Queue: Rayan Kanso <rayankans@chromium.org>
Auto-Submit: Rayan Kanso <rayankans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#812842}

chrome/browser/android/webapk/webapk_installer.cc

@@ -478,7 +478,8 @@ void WebApkInstaller::InstallOrUpdateWebApk(const std::string& package_name,
       base::android::ConvertUTF8ToJavaString(env, token);
 
   if (task_type_ == WebApkInstaller::INSTALL) {
-    webapk::TrackRequestTokenDuration(install_duration_timer_->Elapsed());
+    webapk::TrackRequestTokenDuration(install_duration_timer_->Elapsed(),
+                                      package_name);
     base::android::ScopedJavaLocalRef<jobject> java_primary_icon =
         gfx::ConvertToJavaBitmap(&install_primary_icon_);
     Java_WebApkInstaller_installWebApkAsync(

chrome/browser/android/webapk/webapk_metrics.cc

@@ -5,14 +5,18 @@
 #include "chrome/browser/android/webapk/webapk_metrics.h"
 
 #include "base/metrics/histogram_macros.h"
-#include "base/time/time.h"
+#include "base/strings/string_util.h"
 
 namespace webapk {
 
 const char kInstallDurationHistogram[] = "WebApk.Install.InstallDuration";
 const char kInstallEventHistogram[] = "WebApk.Install.InstallEvent";
 
-void TrackRequestTokenDuration(base::TimeDelta delta) {
+void TrackRequestTokenDuration(base::TimeDelta delta,
+                               const std::string& webapk_package) {
+  if (base::EndsWith(webapk_package, "_v2"))
+    UMA_HISTOGRAM_MEDIUM_TIMES("WebApk.Install.RequestTokenDurationV2", delta);
+  else
     UMA_HISTOGRAM_TIMES("WebApk.Install.RequestTokenDuration", delta);
 }
 

chrome/browser/android/webapk/webapk_metrics.h

@@ -5,9 +5,9 @@
 #ifndef CHROME_BROWSER_ANDROID_WEBAPK_WEBAPK_METRICS_H_
 #define CHROME_BROWSER_ANDROID_WEBAPK_WEBAPK_METRICS_H_
 
-namespace base {
-class TimeDelta;
-}
+#include <string>
+
+#include "base/time/time.h"
 
 namespace webapk {
 
@@ -25,7 +25,8 @@ enum InstallEvent {
   INSTALL_EVENT_MAX = 5,
 };
 
-void TrackRequestTokenDuration(base::TimeDelta delta);
+void TrackRequestTokenDuration(base::TimeDelta delta,
+                               const std::string& webapk_package);
 void TrackInstallDuration(base::TimeDelta delta);
 void TrackInstallEvent(InstallEvent event);
 

tools/metrics/histograms/histograms_xml/web_apk/histograms.xml

@@ -104,6 +104,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 <histogram name="WebApk.Install.RequestTokenDuration" units="ms"
     expires_after="2021-03-15">
   <owner>hartmanng@chromium.org</owner>
+  <owner>rayankans@chromium.org</owner>
   <owner>
     src/chrome/android/java/src/org/chromium/chrome/browser/webapps/OWNERS
   </owner>
@@ -116,6 +117,19 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
   </summary>
 </histogram>
 
+<histogram name="WebApk.Install.RequestTokenDurationV2" units="ms"
+    expires_after="2021-03-15">
+  <owner>hartmanng@chromium.org</owner>
+  <owner>rayankans@chromium.org</owner>
+  <owner>
+    src/chrome/android/java/src/org/chromium/chrome/browser/webapps/OWNERS
+  </owner>
+  <summary>
+    Same as WebApk.Install.RequestTokenDuration, but for WebAPKs minted using
+    the new architecture (v2).
+  </summary>
+</histogram>
+
 <histogram name="WebApk.Launch.NetworkError" enum="NetErrorCodes"
     expires_after="2021-02-01">
   <owner>hartmanng@chromium.org</owner>