[Sync] Rename syncable_prefs to sync_preferences.

ios/chrome/browser/browser_state/BUILD.gn

Index: ios/chrome/browser/browser_state/BUILD.gn
diff --git a/ios/chrome/browser/browser_state/BUILD.gn b/ios/chrome/browser/browser_state/BUILD.gn
index 7405e7c5c341ae7ec092f232407eeffa0a263174..584b3b52b64b346d24b7a43b86866312cc55f115 100644
--- a/ios/chrome/browser/browser_state/BUILD.gn
+++ b/ios/chrome/browser/browser_state/BUILD.gn
@@ -12,7 +12,7 @@ source_set("browser_state") {
   deps = [
     "//base",
     "//components/prefs",
-    "//components/syncable_prefs",
+    "//components/sync_preferences",
     "//ios/web",
     "//net",
   ]
@@ -65,7 +65,7 @@ source_set("browser_state_impl") {
     "//components/signin/core/browser",
     "//components/signin/core/common",
     "//components/sync",
-    "//components/syncable_prefs",
+    "//components/sync_preferences",
     "//components/user_prefs",
     "//google_apis",
     "//ios/chrome/browser:browser_no_public_deps",
@@ -128,8 +128,8 @@ source_set("test_support") {
     "//components/history/ios/browser",
     "//components/keyed_service/core",
     "//components/keyed_service/ios",
-    "//components/syncable_prefs",
-    "//components/syncable_prefs:test_support",
+    "//components/sync_preferences",
+    "//components/sync_preferences:test_support",
     "//components/user_prefs",
     "//components/webdata_services",
     "//ios/chrome/browser",