Delay activation/draw on GPU tile work completion

cc/tiles/tile_draw_info.cc

Index: cc/tiles/tile_draw_info.cc
diff --git a/cc/tiles/tile_draw_info.cc b/cc/tiles/tile_draw_info.cc
index 29f2cc833799ebfcb1606126dc4af34111e52909..461775b73024dcd6923524ef565fef31701310b4 100644
--- a/cc/tiles/tile_draw_info.cc
+++ b/cc/tiles/tile_draw_info.cc
@@ -10,11 +10,7 @@
 namespace cc {
 
 TileDrawInfo::TileDrawInfo()
-    : mode_(RESOURCE_MODE),
-      solid_color_(SK_ColorWHITE),
-      resource_(nullptr),
-      contents_swizzled_(false),
-      was_ever_ready_to_draw_(false),
+    : was_ever_ready_to_draw_(false),
       was_ever_used_to_draw_(false),
       was_a_prepaint_tile_(false) {}
 
@@ -32,4 +28,13 @@ void TileDrawInfo::AsValueInto(base::trace_event::TracedValue* state) const {
                     mode_ == SOLID_COLOR_MODE && !SkColorGetA(solid_color_));
 }
 
+Resource* TileDrawInfo::TakeResource() {
+  if (!resource_)

[vmpstr, 2017/01/05 22:00:46]

Don't need this if.

[ericrk, 2017/01/09 23:05:21]

Done.

+    return nullptr;
+
+  Resource* resource = resource_;
+  set_resource(nullptr);
+  return resource;
+}
+
 }  // namespace cc