cc: Remove cc:RasterRequiredForActivation synthetic delays.

cc/resources/rasterizer.cc

Index: cc/resources/rasterizer.cc
diff --git a/cc/resources/rasterizer.cc b/cc/resources/rasterizer.cc
index df7e27ecebcc147cb745db354527c4804d794934..a1dbffcbf6a1a2f253f2ba243b7f72c5e83f1017 100644
--- a/cc/resources/rasterizer.cc
+++ b/cc/resources/rasterizer.cc
@@ -61,18 +61,16 @@ RasterTaskQueue::Item::Item(RasterTask* task, bool required_for_activation)
 
 RasterTaskQueue::Item::~Item() {}
 
-RasterTaskQueue::RasterTaskQueue() : required_for_activation_count(0u) {}
+RasterTaskQueue::RasterTaskQueue() {
+}
 
 RasterTaskQueue::~RasterTaskQueue() {}
 
 void RasterTaskQueue::Swap(RasterTaskQueue* other) {
   items.swap(other->items);
-  std::swap(required_for_activation_count,
-            other->required_for_activation_count);
 }
 
 void RasterTaskQueue::Reset() {
-  required_for_activation_count = 0u;
   items.clear();
 }