Handle JS-created files in <input type="file">.

Source/core/fileapi/File.h

Index: Source/core/fileapi/File.h
diff --git a/Source/core/fileapi/File.h b/Source/core/fileapi/File.h
index 41741c3e29145a4291fb0c05048b605d3a4e81d6..ea288d891e5d38461a4525be925796d8b64524af 100644
--- a/Source/core/fileapi/File.h
+++ b/Source/core/fileapi/File.h
@@ -47,9 +47,13 @@ public:
         AllContentTypes,
     };
 
+    // The user should not be able to browse to some files, such as the ones
+    // generated by the Filesystem API.
+    enum UserVisibility { IsUserVisible, IsNotUserVisible };
+
     static PassRefPtrWillBeRawPtr<File> create(const String& path, ContentTypeLookupPolicy policy = WellKnownContentTypes)
     {
-        return adoptRefWillBeNoop(new File(path, policy));
+        return adoptRefWillBeNoop(new File(path, policy, File::IsUserVisible));
     }
 
     static PassRefPtrWillBeRawPtr<File> create(const String& name, double modificationTime, PassRefPtr<BlobDataHandle> blobDataHandle)
@@ -58,11 +62,11 @@ public:
     }
 
     // For deserialization.
-    static PassRefPtrWillBeRawPtr<File> create(const String& path, const String& name, const String& relativePath, bool hasSnaphotData, uint64_t size, double lastModified, PassRefPtr<BlobDataHandle> blobDataHandle)
+    static PassRefPtrWillBeRawPtr<File> createFromSerialization(const String& path, const String& name, const String& relativePath, bool hasSnaphotData, uint64_t size, double lastModified, PassRefPtr<BlobDataHandle> blobDataHandle)
     {
         return adoptRefWillBeNoop(new File(path, name, relativePath, hasSnaphotData, size, lastModified, blobDataHandle));
     }
-    static PassRefPtrWillBeRawPtr<File> create(const String& path, const String& name, uint64_t size, double lastModified, PassRefPtr<BlobDataHandle> blobDataHandle)
+    static PassRefPtrWillBeRawPtr<File> createFromIndexedSerialization(const String& path, const String& name, uint64_t size, double lastModified, PassRefPtr<BlobDataHandle> blobDataHandle)
     {
         return adoptRefWillBeNoop(new File(path, name, String(), true, size, lastModified, blobDataHandle));
     }
@@ -88,8 +92,15 @@ public:
     static PassRefPtrWillBeRawPtr<File> createWithName(const String& path, const String& name, ContentTypeLookupPolicy policy = WellKnownContentTypes)
     {
         if (name.isEmpty())
-            return adoptRefWillBeNoop(new File(path, policy));
-        return adoptRefWillBeNoop(new File(path, name, policy));
+            return adoptRefWillBeNoop(new File(path, policy, File::IsNotUserVisible));
+        return adoptRefWillBeNoop(new File(path, name, policy, File::IsNotUserVisible));
+    }
+
+    static PassRefPtrWillBeRawPtr<File> createForFileSystemFile(const String& path, const String& name, ContentTypeLookupPolicy policy = WellKnownContentTypes)
+    {
+        if (name.isEmpty())
+            return adoptRefWillBeNoop(new File(path, policy, File::IsNotUserVisible));
+        return adoptRefWillBeNoop(new File(path, name, policy, File::IsNotUserVisible));
     }
 
     virtual unsigned long long size() const OVERRIDE;
@@ -107,6 +118,8 @@ public:
     // This returns the current date and time if the file's last modification date is not known (per spec: http://www.w3.org/TR/FileAPI/#dfn-lastModifiedDate).
     double lastModifiedDate() const;
 
+    UserVisibility userVisibility() const { return m_userVisibility; }
+
     // Returns the relative path of this file in the context of a directory selection.
     const String& webkitRelativePath() const { return m_relativePath; }
 
@@ -117,8 +130,8 @@ public:
     bool hasValidSnapshotMetadata() const { return m_snapshotSize >= 0; }
 
 private:
-    File(const String& path, ContentTypeLookupPolicy);
-    File(const String& path, const String& name, ContentTypeLookupPolicy);
+    File(const String& path, ContentTypeLookupPolicy, UserVisibility);
+    File(const String& path, const String& name, ContentTypeLookupPolicy, UserVisibility);
     File(const String& path, const String& name, const String& relativePath, bool hasSnaphotData, uint64_t size, double lastModified, PassRefPtr<BlobDataHandle>);
     File(const String& name, double modificationTime, PassRefPtr<BlobDataHandle>);
     File(const String& name, const FileMetadata&);
@@ -133,6 +146,7 @@ private:
 #endif
 
     bool m_hasBackingFile;
+    UserVisibility m_userVisibility;
     String m_path;
     String m_name;