Implement fake drive service upload methods.

chrome/browser/google_apis/fake_drive_service.h

Index: chrome/browser/google_apis/fake_drive_service.h
diff --git a/chrome/browser/google_apis/fake_drive_service.h b/chrome/browser/google_apis/fake_drive_service.h
index cd9a00bf7903c5f3c97ece04abfc146bc8ad85e2..1c91e199212ce3b62f757164d940d75b099d430c 100644
--- a/chrome/browser/google_apis/fake_drive_service.h
+++ b/chrome/browser/google_apis/fake_drive_service.h
@@ -136,6 +136,10 @@ class FakeDriveService : public DriveServiceInterface {
   // not found.
   base::DictionaryValue* FindEntryByContentUrl(const GURL& content_url);
 
+  // Returns a pointer to the entry that matches |upload_url|, or NULL if
+  // not found.
+  base::DictionaryValue* FindEntryByUploadUrl(const GURL& upload_url);
+
   // Returns a new resource ID, which looks like "resource_id_<num>" where
   // <num> is a monotonically increasing number starting from 1.
   std::string GetNewResourceId();