SyncFS: Support resolveLocalFileSystemURL on SyncFileSystem

webkit/browser/fileapi/file_system_context.h

Index: webkit/browser/fileapi/file_system_context.h
diff --git a/webkit/browser/fileapi/file_system_context.h b/webkit/browser/fileapi/file_system_context.h
index 9762b68ebc1c15708c5318f4fa5b285c10a91227..21a31b89eb8be4e603ce3a068f8cd02cd4496bee 100644
--- a/webkit/browser/fileapi/file_system_context.h
+++ b/webkit/browser/fileapi/file_system_context.h
@@ -49,8 +49,8 @@ class CopyOrMoveFileValidatorFactory;
 class ExternalFileSystemBackend;
 class ExternalMountPoints;
 class FileStreamWriter;
-class FileSystemFileUtil;
 class FileSystemBackend;
+class FileSystemFileUtil;
 class FileSystemOperation;
 class FileSystemOperationRunner;
 class FileSystemOptions;
@@ -61,6 +61,7 @@ class MountPoints;
 class SandboxFileSystemBackend;
 
 struct DefaultContextDeleter;
+struct FileSystemInfo;
 
 // This class keeps and provides a file system context for FileSystem API.
 // An instance of this class is created and owned by profile.
@@ -154,6 +155,12 @@ class WEBKIT_STORAGE_BROWSER_EXPORT FileSystemContext
                               const std::string& name,
                               const GURL& root)> OpenFileSystemCallback;
 
+  // Used for ResolveURL.
+  typedef base::Callback<void(base::PlatformFileError result,
+                              const FileSystemInfo& info,
+                              const base::FilePath& file_path,
+                              bool is_directory)> ResolveURLCallback;
+
   // Used for DeleteFileSystem.
   typedef base::Callback<void(base::PlatformFileError result)>
       DeleteFileSystemCallback;
@@ -169,8 +176,15 @@ class WEBKIT_STORAGE_BROWSER_EXPORT FileSystemContext
       OpenFileSystemMode mode,
       const OpenFileSystemCallback& callback);
 
+  // Opens the filesystem for the given |url| as read-only, and then checks the
+  // existence of the file entry referred by the URL. This should be called on
+  // the IO thread.
+  void ResolveURL(
+      const FileSystemURL& url,
+      const ResolveURLCallback& callback);
+
   // Deletes the filesystem for the given |origin_url| and |type|. This should
-  // be called on the IO Thread.
+  // be called on the IO thread.
   void DeleteFileSystem(
       const GURL& origin_url,
       FileSystemType type,
@@ -274,6 +288,13 @@ class WEBKIT_STORAGE_BROWSER_EXPORT FileSystemContext
   // the constructor.
   void RegisterBackend(FileSystemBackend* backend);
 
+  void DidOpenFileSystemForResolveURL(
+      const FileSystemURL& url,
+      const ResolveURLCallback& callback,
+      const GURL& filesystem_root,
+      const std::string& filesystem_name,
+      base::PlatformFileError error);
+
   // Returns a FileSystemBackend, used only by test code.
   SandboxFileSystemBackend* sandbox_backend() const {
     return sandbox_backend_.get();