cc: Invalidate the full tiled layer when contents scale changes.

cc/tiled_layer.cc

Index: cc/tiled_layer.cc
diff --git a/cc/tiled_layer.cc b/cc/tiled_layer.cc
index 67e6d8c03a31f7ac15c8266f7b05bb9df32bf6f2..f69411f9fc1606ff0f450abac87a24a29c20b69c 100644
--- a/cc/tiled_layer.cc
+++ b/cc/tiled_layer.cc
@@ -633,6 +633,9 @@ void TiledLayer::updateScrollPrediction()
 void TiledLayer::update(ResourceUpdateQueue& queue, const OcclusionTracker* occlusion, RenderingStats& stats)
 {
     DCHECK(!m_skipsDraw && !m_failedUpdate); // Did resetUpdateState get skipped?
+
+    ContentsScalingLayer::update(queue, occlusion, stats);

[klobag.chromium, 2012/12/20 00:40:58]

Should this be after updateBounds()?

[danakj, 2012/12/20 00:52:28]

This is acting as the ContentsScalingLayer's version of updating. Other layers
than tiled layer (eg scrolbar) also inherit from ContentsScalingLayer, and they
should call its update() and have it do the same thing.

Whereas updateBounds() is a TiledLayer specific thing.

+
     updateBounds();
     if (m_tiler->hasEmptyBounds() || !drawsContent())
         return;