Adding support checks for FileSystem APIs and making APIs not webkit-specific.

tests/html/html.status

Index: tests/html/html.status
diff --git a/tests/html/html.status b/tests/html/html.status
index 858ea6024f0e3cbea634bc442e945e7377f41d91..673876429aae3909d35f08404bb6ffc449c2f375 100644
--- a/tests/html/html.status
+++ b/tests/html/html.status
@@ -56,7 +56,7 @@ element_types_test/supported_output: Fail
 element_types_test/supported_shadow: Fail
 exceptions_test: Fail
 form_data_test: Fail # TODO(efortuna): Issue 7875.
-fileapi_test: Fail
+fileapi_test/supported: Fail
 inner_frame_test: Skip
 input_element_test/supported_date: Fail
 input_element_test/supported_datetime: Fail
@@ -112,7 +112,7 @@ css_test: Fail
 dom_constructors_test: Fail
 element_test/matches: Fail # IE9 does not support matches
 exceptions_test: Fail
-fileapi_test: Fail          # IE does not support filesystem APIs.
+fileapi_test/supported: Fail
 history_test/supported_state: Fail
 indexeddb_1_test/supported: Fail
 input_element_test/supported_date: Fail
@@ -161,7 +161,7 @@ input_element_test/supported_month: Fail, Crash
 input_element_test/supported_range: Fail, Crash    # TODO(efortuna): Please triage this failure.
 input_element_test/supported_time: Fail, Crash
 input_element_test/supported_week: Fail, Crash
-fileapi_test: Fail # requestFileSystem not supported in Safari 6.
+fileapi_test/supported: Fail
 node_test: Skip # Issue 6457
 shadow_dom_test/supported: Fail
 
@@ -219,7 +219,7 @@ element_types_test/supported_keygen: Fail
 element_types_test/supported_shadow: Fail
 element_types_test/supported_track: Fail
 exceptions_test: Fail      # Uses webkitotifications, no analogue in moz
-fileapi_test: Fail         # FF does not support filesystem APIs.
+fileapi_test/supported: Fail
 # setup code fails. prepare. (DOM callback has errors) Caught [object Event]
 inner_frame_test: Skip
 input_element_test/supported_date: Fail