Fix IsPrecachingAllowed() to check Sync instead of Data Saver.

components/precache/content/precache_manager_unittest.cc

Index: components/precache/content/precache_manager_unittest.cc
diff --git a/components/precache/content/precache_manager_unittest.cc b/components/precache/content/precache_manager_unittest.cc
index 6f5fd89c6dbd53798940b431484705cf35d3bc2e..b0ed8d80f33d80178086ece55d64f7bdc74a64d9 100644
--- a/components/precache/content/precache_manager_unittest.cc
+++ b/components/precache/content/precache_manager_unittest.cc
@@ -124,9 +124,10 @@ class TestPrecacheCompletionCallback {
 class PrecacheManagerTest : public testing::Test {
  public:
   PrecacheManagerTest()
-      : precache_manager_(&browser_context_),
-        factory_(NULL, base::Bind(&TestURLFetcherCallback::CreateURLFetcher,
-                                  base::Unretained(&url_callback_))) {}
+      : precache_manager_(&browser_context_, nullptr /* sync_service */),
+        factory_(NULL,
+                 base::Bind(&TestURLFetcherCallback::CreateURLFetcher,
+                            base::Unretained(&url_callback_))) {}
 
  protected:
   void SetUp() override {