Remove unused #include in //chrome/browser/history

chrome/browser/history/history_backend.cc

Index: chrome/browser/history/history_backend.cc
diff --git a/chrome/browser/history/history_backend.cc b/chrome/browser/history/history_backend.cc
index f8dea15b5a054899859590c9c240780030d5e7c6..778db4f59263fe7bb84eb5ffbd613d1f686d35b9 100644
--- a/chrome/browser/history/history_backend.cc
+++ b/chrome/browser/history/history_backend.cc
@@ -23,14 +23,9 @@
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
-#include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/history/in_memory_history_backend.h"
-#include "chrome/browser/history/in_memory_history_backend.h"
-#include "chrome/browser/history/typed_url_syncable_service.h"
 #include "chrome/browser/history/typed_url_syncable_service.h"
-#include "chrome/common/chrome_constants.h"
 #include "chrome/common/importer/imported_favicon_usage.h"
-#include "chrome/common/url_constants.h"
 #include "components/favicon_base/select_favicon_frames.h"
 #include "components/history/core/browser/download_constants.h"
 #include "components/history/core/browser/download_row.h"
@@ -48,6 +43,7 @@
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/gfx/codec/png_codec.h"
 #include "url/gurl.h"
+#include "url/url_constants.h"
 
 #if defined(OS_ANDROID)
 #include "chrome/browser/history/android/android_provider_backend.h"