Pref service: expose all read-only PrefStores through Mojo

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index 8b3d55ad2f7adc5e12ba527a16d2597eb98609a5..016df508fde6a3aedf2ac09c8cde227307457fa8 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -195,6 +195,7 @@
 #include "ppapi/host/ppapi_host.h"
 #include "printing/features/features.h"
 #include "services/image_decoder/public/interfaces/constants.mojom.h"
+#include "services/preferences/public/cpp/pref_store_manager_impl.h"
 #include "services/preferences/public/interfaces/preferences.mojom.h"
 #include "services/service_manager/public/cpp/interface_provider.h"
 #include "services/service_manager/public/cpp/interface_registry.h"
@@ -3233,6 +3234,20 @@ void ChromeContentBrowserClient::RegisterInProcessServices(
 #endif  // OS_CHROMEOS
 }
 
+void ChromeContentBrowserClient::RegisterInProcessServices(
+    content::BrowserContext* browser_context,
+    StaticServiceMap* services) {
+  {
+    content::ServiceInfo info;
+    info.factory = base::Bind([] {
+      return std::unique_ptr<service_manager::Service>(
+          base::MakeUnique<prefs::PrefStoreManagerImpl>(
+              prefs::PrefStoreManagerImpl::PrefStoreTypes()));
+    });
+    services->insert(std::make_pair(prefs::mojom::kPrefStoreServiceName, info));
+  }
+}
+
 void ChromeContentBrowserClient::RegisterOutOfProcessServices(
       OutOfProcessServiceMap* services) {
 #if defined(ENABLE_MOJO_MEDIA_IN_UTILITY_PROCESS)