Move some file api files to fileapi folder

storage/storage_browser.gyp

Index: storage/storage_browser.gyp
diff --git a/storage/storage_browser.gyp b/storage/storage_browser.gyp
index 070eca23d9361a8d2ad44a191f7660b191a2a99e..6a8b749838581b39d10d3fea9ff349fa7ad8823c 100644
--- a/storage/storage_browser.gyp
+++ b/storage/storage_browser.gyp
@@ -39,12 +39,8 @@
         'browser/blob/blob_url_request_job.h',
         'browser/blob/blob_url_request_job_factory.cc',
         'browser/blob/blob_url_request_job_factory.h',
-        'browser/blob/file_stream_reader.cc',
-        'browser/blob/file_stream_reader.h',
         'browser/blob/internal_blob_data.cc',
         'browser/blob/internal_blob_data.h',
-        'browser/blob/local_file_stream_reader.cc',
-        'browser/blob/local_file_stream_reader.h',
         'browser/blob/scoped_file.cc',
         'browser/blob/scoped_file.h',
         'browser/blob/shareable_blob_data_item.cc',
@@ -75,6 +71,8 @@
         'browser/fileapi/external_mount_points.h',
         'browser/fileapi/file_observers.h',
         'browser/fileapi/file_permission_policy.h',
+        'browser/fileapi/file_stream_reader.cc',
+        'browser/fileapi/file_stream_reader.h',
         'browser/fileapi/file_stream_writer.h',
         'browser/fileapi/file_system_backend.h',
         'browser/fileapi/file_system_context.cc',
@@ -111,6 +109,8 @@
         'browser/fileapi/isolated_context.h',
         'browser/fileapi/isolated_file_system_backend.cc',
         'browser/fileapi/isolated_file_system_backend.h',
+        'browser/fileapi/local_file_stream_reader.cc',
+        'browser/fileapi/local_file_stream_reader.h',
         'browser/fileapi/local_file_stream_writer.cc',
         'browser/fileapi/local_file_stream_writer.h',
         'browser/fileapi/local_file_util.cc',