Blink changes to record interest rects for http://w3c.github.io/frame-timing/

Source/core/timing/PerformanceRenderTiming.idl

Index: Source/core/timing/PerformanceRenderTiming.idl
diff --git a/Source/bindings/tests/idls/core/TestInterfaceDocument.idl b/Source/core/timing/PerformanceRenderTiming.idl
similarity index 88%
copy from Source/bindings/tests/idls/core/TestInterfaceDocument.idl
copy to Source/core/timing/PerformanceRenderTiming.idl
index 2a687e871a44bace871a2d7b65243bbbdedc7339..9ec0da47d70c2e0b70463b2adbfc09208dee543e 100644
--- a/Source/bindings/tests/idls/core/TestInterfaceDocument.idl
+++ b/Source/core/timing/PerformanceRenderTiming.idl
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2014 Google Inc. All rights reserved.
+ * Copyright (C) 2015 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ -28,5 +28,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-interface TestInterfaceDocument : Document {
+// See: http://w3c.github.io/frame-timing/
+interface PerformanceRenderTiming : PerformanceEntry {
+    readonly attribute unsigned long sourceFrame;
 };