cc: Don't let invalidations that we're going to handle immediately cause an extra commit.

cc/tiled_layer.cc

Index: cc/tiled_layer.cc
diff --git a/cc/tiled_layer.cc b/cc/tiled_layer.cc
index f69411f9fc1606ff0f450abac87a24a29c20b69c..5033a2d66bb6c781782f5b77cb89a050229e7cb0 100644
--- a/cc/tiled_layer.cc
+++ b/cc/tiled_layer.cc
@@ -4,6 +4,7 @@
 
 #include "cc/tiled_layer.h"
 
+#include "base/auto_reset.h"
 #include "base/basictypes.h"
 #include "build/build_config.h"
 #include "cc/layer_impl.h"
@@ -634,9 +635,13 @@ void TiledLayer::update(ResourceUpdateQueue& queue, const OcclusionTracker* occl
 {
     DCHECK(!m_skipsDraw && !m_failedUpdate); // Did resetUpdateState get skipped?
 
-    ContentsScalingLayer::update(queue, occlusion, stats);
+    {
+        base::AutoReset<bool> ignoreSetNeedsCommit(&m_ignoreSetNeedsCommit, true);
+
+        ContentsScalingLayer::update(queue, occlusion, stats);
+        updateBounds();
+    }
 
-    updateBounds();
     if (m_tiler->hasEmptyBounds() || !drawsContent())
         return;