FileAPI: Add WebFileSystem::resolveURL

public/platform/WebFileSystemCallbacks.h

Index: public/platform/WebFileSystemCallbacks.h
diff --git a/public/platform/WebFileSystemCallbacks.h b/public/platform/WebFileSystemCallbacks.h
index 2ae6dc52fb4eb55b1eb756e0b68e989fedc4d03a..ece9b5e273edd9bfba5bc1382e868bed4a7c3ef7 100644
--- a/public/platform/WebFileSystemCallbacks.h
+++ b/public/platform/WebFileSystemCallbacks.h
@@ -34,6 +34,7 @@
 #include "WebCommon.h"
 #include "WebFileError.h"
 #include "WebFileSystemEntry.h"
+#include "WebFileSystemType.h"
 #include "WebPrivatePtr.h"
 #include "WebVector.h"
 
@@ -90,6 +91,11 @@ public:
     // root URL for the FileSystem when the request is accepted.
     WEBKIT_EXPORT void didOpenFileSystem(const WebString& name, const WebURL& rootURL);
 
+    // Callback for WebFileSystem::resolveURL. Called with a name, root URL and
+    // file path for the FileSystem when the request is accepted. |isDirectory|
+    // must be true when an entry to be resolved is a directory.
+    WEBKIT_EXPORT void didResolveURL(const WebString& name, const WebURL& rootURL, WebFileSystemType, const WebString& filePath, bool isDirectory);
+
     // Callback for WebFileSystem::createFileWriter. Called with an instance
     // of WebFileWriter and the target file length. The writer's ownership
     // is transferred to the callback.