arc: Add methods to IntentHelperInstance to read ARC contents

components/arc/test/fake_intent_helper_instance.h

Index: components/arc/test/fake_intent_helper_instance.h
diff --git a/components/arc/test/fake_intent_helper_instance.h b/components/arc/test/fake_intent_helper_instance.h
index eb2685b8b2b541f53cb2f81db193f370a29f9e47..3c1768c98e53283d8fd9e024f477e877ccf95ec8 100644
--- a/components/arc/test/fake_intent_helper_instance.h
+++ b/components/arc/test/fake_intent_helper_instance.h
@@ -44,6 +44,9 @@ class FakeIntentHelperInstance : public mojom::IntentHelperInstance {
 
   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;
 
@@ -56,6 +59,9 @@ class FakeIntentHelperInstance : public mojom::IntentHelperInstance {
 
   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,