Move declarative api files to extensions/browser/api/declarative.

extensions/browser/api/extensions_api_client.cc

Index: extensions/browser/api/extensions_api_client.cc
diff --git a/extensions/browser/api/extensions_api_client.cc b/extensions/browser/api/extensions_api_client.cc
index 0fb3a7996e25a1b961bb79d282ceac6bf524be03..2f809ef9cb629f14c22e82e0bc2a85a08e28b8be 100644
--- a/extensions/browser/api/extensions_api_client.cc
+++ b/extensions/browser/api/extensions_api_client.cc
@@ -48,4 +48,11 @@ WebViewPermissionHelperDelegate* ExtensionsAPIClient::
   return NULL;
 }
 
+scoped_refptr<RulesRegistry> ExtensionsAPIClient::GetRulesRegistry(
+    content::BrowserContext* browser_context,
+    const RulesRegistry::WebViewKey& webview_key,
+    const std::string& event_name) {
+  return scoped_refptr<RulesRegistry>();
+}
+
 }  // namespace extensions