arc: Implement Read and GetFileSize for ARC content file system

components/arc/test/fake_intent_helper_instance.h

 // Copyright 2016 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.
 
 #ifndef COMPONENTS_ARC_TEST_FAKE_INTENT_HELPER_INSTANCE_H_
 #define COMPONENTS_ARC_TEST_FAKE_INTENT_HELPER_INSTANCE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 26 matching lines @@
 
   void clear_broadcasts() { broadcasts_.clear(); }
 
   const std::vector<Broadcast>& broadcasts() const { return broadcasts_; }
 
   // mojom::IntentHelperInstance:
   ~FakeIntentHelperInstance() override;
 
   void AddPreferredPackage(const mojo::String& package_name) override;
 
+  void GetFileSize(const mojo::String& url,
+                   const GetFileSizeCallback& callback) override;
+
   void HandleIntent(mojom::IntentInfoPtr intent,
                     mojom::ActivityNamePtr activity) override;
 
   void HandleUrl(const mojo::String& url,
                  const mojo::String& package_name) override;
 
   void HandleUrlList(mojo::Array<mojom::UrlWithMimeTypePtr> urls,
                      mojom::ActivityNamePtr activity,
                      mojom::ActionType action) override;
 
   void Init(mojom::IntentHelperHostPtr host_ptr) override;
 
+  void OpenFileToRead(const mojo::String& url,
+                      const OpenFileToReadCallback& callback) override;
+
   void RequestActivityIcons(
       mojo::Array<mojom::ActivityNamePtr> activities,
       ::arc::mojom::ScaleFactor scale_factor,
       const RequestActivityIconsCallback& callback) override;
 
   void RequestIntentHandlerList(
       mojom::IntentInfoPtr intent,
       const RequestIntentHandlerListCallback& callback) override;
 
   void RequestUrlHandlerList(
@@ skipping 11 matching lines @@
 
  private:
   std::vector<Broadcast> broadcasts_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeIntentHelperInstance);
 };
 
 }  // namespace arc
 
 #endif  // COMPONENTS_ARC_TEST_FAKE_POLICY_INSTANCE_H_