cc: Fix uninitialized TransformNodeData member

R=ajuma@chromium.org

Review URL: https://codereview.chromium.org/1149843004

Cr-Commit-Position: refs/heads/master@{#330827}

cc/trees/property_tree.cc

@@ -58,7 +58,8 @@ TransformNodeData::TransformNodeData()
       node_and_ancestors_are_flat(true),
       scrolls(false),
       needs_sublayer_scale(false),
-      layer_scale_factor(1.0f) {
+      layer_scale_factor(1.0f),
+      post_local_scale_factor(1.0f) {
 }
 
 TransformNodeData::~TransformNodeData() {