[Spellcheck] Add UMA stat for SpellingService

chrome/browser/spellchecker/spellcheck_service.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/spellchecker/spellcheck_service.h"
 
 #include "base/platform_file.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/public/pref_member.h"
 #include "base/string_split.h"
@@ skipping 30 matching lines @@
   pref_change_registrar_.Init(prefs);
 
   pref_change_registrar_.Add(
       prefs::kEnableAutoSpellCorrect,
       base::Bind(&SpellcheckService::OnEnableAutoSpellCorrectChanged,
                  base::Unretained(this)));
   pref_change_registrar_.Add(
       prefs::kSpellCheckDictionary,
       base::Bind(&SpellcheckService::OnSpellCheckDictionaryChanged,
                  base::Unretained(this)));
+ pref_change_registrar_.Add(
+     prefs::kSpellCheckUseSpellingService,
+     base::Bind(&SpellcheckService::OnUseSpellingServiceChanged,
+                base::Unretained(this)));
   pref_change_registrar_.Add(
       prefs::kEnableContinuousSpellcheck,
       base::Bind(&SpellcheckService::InitForAllRenderers,
                  base::Unretained(this)));
 
   OnSpellCheckDictionaryChanged();
 
   custom_dictionary_.reset(new SpellcheckCustomDictionary(profile_->GetPath()));
   custom_dictionary_->AddObserver(this);
   custom_dictionary_->Load();
@@ skipping 71 matching lines @@
   if (!g_status_event)
     return false;
   g_status_type = status_type;
   g_status_event->Signal();
   return true;
 }
 
 void SpellcheckService::StartRecordingMetrics(bool spellcheck_enabled) {
   metrics_.reset(new SpellCheckHostMetrics());
   metrics_->RecordEnabledStats(spellcheck_enabled);
+  OnUseSpellingServiceChanged();
 }
 
 void SpellcheckService::InitForRenderer(content::RenderProcessHost* process) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   Profile* profile = Profile::FromBrowserContext(process->GetBrowserContext());
   if (SpellcheckServiceFactory::GetForProfile(profile) != this)
     return;
 
   PrefService* prefs = profile->GetPrefs();
@@ skipping 112 matching lines @@
 void SpellcheckService::OnSpellCheckDictionaryChanged() {
   if (hunspell_dictionary_.get())
     hunspell_dictionary_->RemoveObserver(this);
   hunspell_dictionary_.reset(new SpellcheckHunspellDictionary(
       profile_->GetPrefs()->GetString(prefs::kSpellCheckDictionary),
       profile_->GetRequestContext(),
       this));
   hunspell_dictionary_->AddObserver(this);
   hunspell_dictionary_->Load();
 }
+
+void SpellcheckService::OnUseSpellingServiceChanged() {
+  bool enabled = pref_change_registrar_.prefs()->GetBoolean(
+      prefs::kSpellCheckUseSpellingService);
+  if (metrics_)
+    metrics_->RecordSpellingServiceStats(enabled);
+}