Add EXPERIMENTAL_beginRecording() for SkRecord-based recording.

gyp/record.gypi

Index: gyp/record.gypi
diff --git a/gyp/record.gypi b/gyp/record.gypi
index adfd4623ae57889c34d8516031b5f8f069ec8a99..9415a57547823001bb3ab0075277062f74ca8259 100644
--- a/gyp/record.gypi
+++ b/gyp/record.gypi
@@ -1,12 +1,3 @@
-# Source list for SkRecord
-# The parent gyp/gypi file must define
-#       'skia_src_path'     e.g. skia/trunk/src
-# The Skia build defines this in common_variables.gypi.
+# TODO: cleanup references in Chrome build and remove
 {
-    'sources': [
-        '<(skia_src_path)/record/SkRecordDraw.cpp',
-        '<(skia_src_path)/record/SkRecordOpts.cpp',
-        '<(skia_src_path)/record/SkRecorder.cpp',
-        '<(skia_src_path)/record/SkRecording.cpp',
-    ]
 }