Remove NOTIFICATION_HISTORY_URLS_DELETED

chrome/browser/predictors/resource_prefetch_predictor.cc

Index: chrome/browser/predictors/resource_prefetch_predictor.cc
diff --git a/chrome/browser/predictors/resource_prefetch_predictor.cc b/chrome/browser/predictors/resource_prefetch_predictor.cc
index 6f1eeab35dc739d8175bec98fe0eda1c586d846e..36372515e91cd72be7d9ae7a7a3a127e3272da37 100644
--- a/chrome/browser/predictors/resource_prefetch_predictor.cc
+++ b/chrome/browser/predictors/resource_prefetch_predictor.cc
@@ -29,9 +29,6 @@
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/navigation_controller.h"
-#include "content/public/browser/notification_service.h"
-#include "content/public/browser/notification_source.h"
-#include "content/public/browser/notification_types.h"
 #include "content/public/browser/resource_request_info.h"
 #include "content/public/browser/web_contents.h"
 #include "net/base/mime_util.h"
@@ -437,43 +434,12 @@ void ResourcePrefetchPredictor::FinishedPrefetchForNavigation(
   }
 }
 
-void ResourcePrefetchPredictor::Observe(
-    int type,
-    const content::NotificationSource& source,
-    const content::NotificationDetails& details) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-
-  switch (type) {
-    case chrome::NOTIFICATION_HISTORY_URLS_DELETED: {
-      DCHECK_EQ(initialization_state_, INITIALIZED);
-      const content::Details<const history::URLsDeletedDetails>
-          urls_deleted_details =
-              content::Details<const history::URLsDeletedDetails>(details);
-      if (urls_deleted_details->all_history) {
-        DeleteAllUrls();
-        UMA_HISTOGRAM_ENUMERATION("ResourcePrefetchPredictor.ReportingEvent",
-                                  REPORTING_EVENT_ALL_HISTORY_CLEARED,
-                                  REPORTING_EVENT_COUNT);
-      } else {
-        DeleteUrls(urls_deleted_details->rows);
-        UMA_HISTOGRAM_ENUMERATION("ResourcePrefetchPredictor.ReportingEvent",
-                                  REPORTING_EVENT_PARTIAL_HISTORY_CLEARED,
-                                  REPORTING_EVENT_COUNT);
-      }
-      break;
-    }
-
-    default:
-      NOTREACHED() << "Unexpected notification observed.";
-      break;
-  }
-}
-
 void ResourcePrefetchPredictor::Shutdown() {
   if (prefetch_manager_.get()) {
     prefetch_manager_->ShutdownOnUIThread();
     prefetch_manager_ = NULL;
   }
+  history_service_observer_.RemoveAll();
 }
 
 void ResourcePrefetchPredictor::OnMainFrameRequest(
@@ -751,17 +717,11 @@ void ResourcePrefetchPredictor::OnHistoryAndCacheLoaded() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   DCHECK_EQ(initialization_state_, INITIALIZING);
 
-  notification_registrar_.Add(this,
-                              chrome::NOTIFICATION_HISTORY_URLS_DELETED,
-                              content::Source<Profile>(profile_));
-
   // Initialize the prefetch manager only if prefetching is enabled.
   if (config_.IsPrefetchingEnabled(profile_)) {
     prefetch_manager_ = new ResourcePrefetcherManager(
         this, config_, profile_->GetRequestContext());
   }
-
-  history_service_observer_.RemoveAll();
   initialization_state_ = INITIALIZED;
 }
 
@@ -1339,6 +1299,23 @@ void ResourcePrefetchPredictor::ReportPredictedAccuracyStatsHelper(
 #undef RPP_PREDICTED_HISTOGRAM_COUNTS
 }
 
+void ResourcePrefetchPredictor::OnURLsDeleted(
+    HistoryService* history_service,
+    const history::URLsDeletedDetails& deleted_details) {
+  DCHECK_EQ(initialization_state_, INITIALIZED);
+  if (deleted_details.all_history) {
+    DeleteAllUrls();
+    UMA_HISTOGRAM_ENUMERATION("ResourcePrefetchPredictor.ReportingEvent",
+                              REPORTING_EVENT_ALL_HISTORY_CLEARED,
+                              REPORTING_EVENT_COUNT);
+  } else {
+    DeleteUrls(deleted_details.rows);
+    UMA_HISTOGRAM_ENUMERATION("ResourcePrefetchPredictor.ReportingEvent",
+                              REPORTING_EVENT_PARTIAL_HISTORY_CLEARED,
+                              REPORTING_EVENT_COUNT);
+  }
+}
+
 void ResourcePrefetchPredictor::OnHistoryServiceLoaded(
     HistoryService* history_service) {
   OnHistoryAndCacheLoaded();