Add UMA to passphrase dialog.

Count how often the passphrase dialog is displayed and closed,
and whether the entered passphrase was correct.

Related changelist which defines ManagedMode_PassphraseCorrect in the histograms.xml:
https://chromereviews.googleplex.com/7312014/

BUG=171382
TEST=Manual

Review URL: https://chromiumcodereview.appspot.com/12604013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@192055 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 12 insertions, 3 deletions

diff --git a/chrome/browser/ui/webui/managed_user_passphrase_dialog.cc b/chrome/browser/ui/webui/managed_user_passphrase_dialog.cc
index 601ba95..64f92fca 100644
--- a/chrome/browser/ui/webui/managed_user_passphrase_dialog.cc
+++ b/chrome/browser/ui/webui/managed_user_passphrase_dialog.cc
@@ -9,6 +9,7 @@
 
 #include "base/bind.h"
 #include "base/memory/weak_ptr.h"
+#include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
 #include "base/values.h"
 #include "chrome/browser/managed_mode/managed_user_passphrase.h"
@@ -16,6 +17,7 @@
 #include "chrome/browser/ui/webui/constrained_web_dialog_ui.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
+#include "content/public/browser/user_metrics.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_ui_data_source.h"
 #include "content/public/browser/web_ui_message_handler.h"
@@ -24,6 +26,8 @@
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/size.h"
 
+using content::UserMetricsAction;
+
 namespace {
 
 // Handles the message when the user entered a passphrase and clicks the Unlock
@@ -50,7 +54,8 @@ class ManagedUserPassphraseDialogMessageHandler
 };
 
 ManagedUserPassphraseDialogMessageHandler
-    ::ManagedUserPassphraseDialogMessageHandler() : weak_factory_(this) {
+    ::ManagedUserPassphraseDialogMessageHandler()
+    : ALLOW_THIS_IN_INITIALIZER_LIST(weak_factory_(this)) {
 }
 
 void ManagedUserPassphraseDialogMessageHandler::RegisterMessages() {
@@ -83,9 +88,10 @@ void ManagedUserPassphraseDialogMessageHandler::CheckPassphrase(
 
   // Check if the entered passphrase is correct and give the result back to the
   // UI.
-  base::FundamentalValue passphrase_correct(
-      stored_passphrase_hash == encoded_passphrase_hash);
+  bool is_correct = stored_passphrase_hash == encoded_passphrase_hash;
+  base::FundamentalValue passphrase_correct(is_correct);
   web_ui()->CallJavascriptFunction("passphraseResult", passphrase_correct);
+  UMA_HISTOGRAM_BOOLEAN("ManagedMode_PassphraseCorrect", is_correct);
 }
 
 }  // namespace
@@ -93,6 +99,7 @@ void ManagedUserPassphraseDialogMessageHandler::CheckPassphrase(
 ManagedUserPassphraseDialog::ManagedUserPassphraseDialog(
     content::WebContents* web_contents,
     const PassphraseCheckedCallback& callback) : callback_(callback) {
+  content::RecordAction(UserMetricsAction("ManagedMode_OpenPassphraseDialog"));
   Profile* profile =
       Profile::FromBrowserContext(web_contents->GetBrowserContext());
   CreateDataSource(profile);
@@ -135,6 +142,8 @@ void ManagedUserPassphraseDialog::OnDialogClosed(
   if (!callback_.is_null()) {
     callback_.Run(!json_retval.empty());
     callback_.Reset();
+    content::RecordAction(
+        UserMetricsAction("ManagedMode_ClosePassphraseDialog"));
   }
 }