Disable precache if data_reduction_proxy enabled.

chrome/browser/precache/precache_manager_factory.cc

Index: chrome/browser/precache/precache_manager_factory.cc
diff --git a/chrome/browser/precache/precache_manager_factory.cc b/chrome/browser/precache/precache_manager_factory.cc
index dbe8e404ecdde54952c8346ce6556d2b834a247f..9d8552e8603d964686e98afa251fe5ce1eed5a7f 100644
--- a/chrome/browser/precache/precache_manager_factory.cc
+++ b/chrome/browser/precache/precache_manager_factory.cc
@@ -5,9 +5,12 @@
 #include "chrome/browser/precache/precache_manager_factory.h"
 
 #include <memory>
+#include <utility>
 
 #include "base/files/file_path.h"
 #include "chrome/browser/history/history_service_factory.h"
+#include "chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.h"
+#include "chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
@@ -52,6 +55,8 @@ KeyedService* PrecacheManagerFactory::BuildServiceInstanceFor(
       HistoryServiceFactory::GetForProfile(
           Profile::FromBrowserContext(browser_context),
           ServiceAccessType::IMPLICIT_ACCESS),
+      DataReductionProxyChromeSettingsFactory::GetForBrowserContext(
+          browser_context),
       db_path, std::move(precache_database));
 }