mediaview: Implement ArcDocumentsProviderBackendDelegate.

chrome/browser/chromeos/arc/fileapi/arc_documents_provider_util.h

Index: chrome/browser/chromeos/arc/fileapi/arc_documents_provider_util.h
diff --git a/chrome/browser/chromeos/arc/fileapi/arc_documents_provider_util.h b/chrome/browser/chromeos/arc/fileapi/arc_documents_provider_util.h
index 87d6b9a96c650f522fe2c1c89007e6964e54b94c..38ae3c862f013b4c615109d9af815893af89dd85 100644
--- a/chrome/browser/chromeos/arc/fileapi/arc_documents_provider_util.h
+++ b/chrome/browser/chromeos/arc/fileapi/arc_documents_provider_util.h
@@ -11,6 +11,8 @@
 
 #include "base/files/file_path.h"
 
+class GURL;
+
 namespace storage {
 class FileSystemURL;
 }  // namespace storage
@@ -34,6 +36,10 @@ bool ParseDocumentsProviderUrl(const storage::FileSystemURL& url,
                                std::string* root_document_id,
                                base::FilePath* path);
 
+// C++ implementation of DocumentsContract.buildDocumentUri() in Android.
+GURL BuildDocumentUrl(const std::string& authority,
+                      const std::string& document_id);
+
 }  // namespace arc
 
 #endif  // CHROME_BROWSER_CHROMEOS_ARC_FILEAPI_ARC_DOCUMENTS_PROVIDER_UTIL_H_