cc: Move worker threads to content.

cc/resources/display_list_recording_source.cc

Index: cc/resources/display_list_recording_source.cc
diff --git a/cc/resources/display_list_recording_source.cc b/cc/resources/display_list_recording_source.cc
index 367b23d73a11b5ab432e566dc837d2dda5c62910..296036d7c3e10961d4df016c560bb5ef11fc5581 100644
--- a/cc/resources/display_list_recording_source.cc
+++ b/cc/resources/display_list_recording_source.cc
@@ -28,6 +28,7 @@ namespace cc {
 
 DisplayListRecordingSource::DisplayListRecordingSource()
     : slow_down_raster_scale_factor_for_debug_(0),
+      gather_pixel_refs_(false),
       requires_clear_(false),
       is_solid_color_(false),
       solid_color_(SK_ColorTRANSPARENT),
@@ -135,6 +136,10 @@ void DisplayListRecordingSource::SetSlowdownRasterScaleFactor(int factor) {
   slow_down_raster_scale_factor_for_debug_ = factor;
 }
 
+void DisplayListRecordingSource::SetGatherPixelRefs(bool gather_pixel_refs) {
+  gather_pixel_refs_ = gather_pixel_refs;
+}
+
 void DisplayListRecordingSource::SetBackgroundColor(SkColor background_color) {
   background_color_ = background_color;
 }