Remove unnecessary includes.

BUG=387069
R=bauerb@chromium.org, jochen@chromium.org
TEST=build succeeds

Review URL: https://codereview.chromium.org/538753003

Cr-Commit-Position: refs/heads/master@{#293363}

chrome/browser/content_settings/content_settings_policy_provider.cc

@@ -10,15 +10,12 @@
 #include "base/json/json_reader.h"
 #include "base/prefs/pref_service.h"
 #include "base/values.h"
-#include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/content_settings/content_settings_rule.h"
 #include "chrome/browser/content_settings/content_settings_utils.h"
 #include "chrome/common/content_settings_pattern.h"
 #include "chrome/common/pref_names.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "content/public/browser/browser_thread.h"
-#include "content/public/browser/notification_details.h"
-#include "content/public/browser/notification_source.h"
 
 using content::BrowserThread;
 

chrome/browser/content_settings/content_settings_pref_provider.cc

@@ -16,7 +16,6 @@
 #include "base/prefs/scoped_user_pref_update.h"
 #include "base/time/clock.h"
 #include "base/time/default_clock.h"
-#include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/content_settings/content_settings_rule.h"
 #include "chrome/browser/content_settings/content_settings_utils.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
@@ -26,8 +25,6 @@
 #include "chrome/common/pref_names.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "content/public/browser/browser_thread.h"
-#include "content/public/browser/notification_details.h"
-#include "content/public/browser/notification_source.h"
 #include "content/public/browser/user_metrics.h"
 #include "url/gurl.h"