SetNeedsRedraw directly when updating a visible tile.

cc/test/fake_picture_layer.cc

Index: cc/test/fake_picture_layer.cc
diff --git a/cc/test/fake_picture_layer.cc b/cc/test/fake_picture_layer.cc
index bd169ba770b4199d617af4372488ec41b5673303..51fcf26a43479138b251c8581d5d24c9165c57ad 100644
--- a/cc/test/fake_picture_layer.cc
+++ b/cc/test/fake_picture_layer.cc
@@ -4,6 +4,7 @@
 
 #include "cc/test/fake_picture_layer.h"
 
+#include "cc/test/delayed_raster_picture_pile_impl.h"
 #include "cc/test/fake_picture_layer_impl.h"
 
 namespace cc {
@@ -12,8 +13,9 @@ FakePictureLayer::FakePictureLayer(ContentLayerClient* client)
     : PictureLayer(client),
       update_count_(0),
       push_properties_count_(0),
+      output_surface_created_count_(0),
       always_update_resources_(false),
-      output_surface_created_count_(0) {
+      delayed_raster_trigger_(nullptr) {
   SetBounds(gfx::Size(1, 1));
   SetIsDrawable(true);
 }
@@ -42,4 +44,11 @@ void FakePictureLayer::OnOutputSurfaceCreated() {
   output_surface_created_count_++;
 }
 
+scoped_refptr<PicturePileImpl> FakePictureLayer::CreatePicturePileImpl() {
+  if (!delayed_raster_trigger_)
+    return PictureLayer::CreatePicturePileImpl();
+  return DelayedRasterPicturePileImpl::CreateFromOther(
+      GetPicturePileForTesting(), delayed_raster_trigger_);

[reveman, 2014/11/10 23:43:02]

note: if you end up reusing FakePicturePileImpl then maybe a bit cleaner to
create a picturepileimpl of that type here unconditionally and instead handle
the case where delayed_raster_trigger_ is null inside the pile implementation
instead.

[danakj, 2014/11/12 20:19:40]

I added a constructor to FakePictureLayer to override the pile, since
PictureLayer now sets up the pile in its constructor.

+}
+
 }  // namespace cc