Add support for writing unit tests for Mojo-backed apps/extensions APIs.

extensions/test/test_extensions_client.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/test/test_extensions_client.h"
 
+#include "extensions/common/api/generated_schemas.h"
 #include "extensions/common/common_manifest_handlers.h"
 #include "extensions/common/features/feature_provider.h"
 #include "extensions/common/features/json_feature_provider_source.h"
 #include "extensions/common/manifest_handler.h"
 #include "extensions/common/url_pattern_set.h"
 #include "extensions/test/test_permission_message_provider.h"
 
 namespace extensions {
 
 TestExtensionsClient::TestExtensionsClient() {
@@ skipping 53 matching lines @@
   return hosts;
 }
 
 bool TestExtensionsClient::IsScriptableURL(const GURL& url,
                                            std::string* error) const {
   return true;
 }
 
 bool TestExtensionsClient::IsAPISchemaGenerated(
     const std::string& name) const {
-  return false;
+  return core_api::GeneratedSchemas::IsGenerated(name);
 }
 
 base::StringPiece TestExtensionsClient::GetAPISchema(
     const std::string& name) const {
-  return base::StringPiece();
+  return core_api::GeneratedSchemas::Get(name);
 }
 
 void TestExtensionsClient::RegisterAPISchemaResources(ExtensionAPI* api) const {
 }
 
 bool TestExtensionsClient::ShouldSuppressFatalErrors() const {
   return true;
 }
 
 }  // namespace extensions