Test multideque

cc/resources/resource_pool.cc

Index: cc/resources/resource_pool.cc
diff --git a/cc/resources/resource_pool.cc b/cc/resources/resource_pool.cc
index aa2ddc5de0f172f0a29de09378950b9ffdb897ea..b020497d089120945e804ec9a4666b9911d38803 100644
--- a/cc/resources/resource_pool.cc
+++ b/cc/resources/resource_pool.cc
@@ -94,21 +94,26 @@ Resource* ResourcePool::AcquireResource(const gfx::Size& size,
   // Finding resources in |unused_resources_| from MRU to LRU direction, touches
   // LRU resources only if needed, which increases possibility of expiring more
   // LRU resources within kResourceExpirationDelayMs.
-  for (ResourceDeque::iterator it = unused_resources_.begin();
-       it != unused_resources_.end(); ++it) {
-    ScopedResource* resource = *it;
-    DCHECK(resource_provider_->CanLockForWrite(resource->id()));
-
-    if (resource->format() != format)
-      continue;
-    if (resource->size() != size)
-      continue;
-
-    // Transfer resource to |in_use_resources_|.
-    in_use_resources_.set(resource->id(), unused_resources_.take(it));
-    in_use_memory_usage_bytes_ += ResourceUtil::UncheckedSizeInBytes<size_t>(
-        resource->size(), resource->format());
-    return resource;
+  {
+    TRACE_EVENT1("cc, pras", "ResourcePool::AcquireResource", "total_unused",
+                 unused_resources_.size());
+
+    for (ResourceDeque::iterator it = unused_resources_.begin();
+         it != unused_resources_.end(); ++it) {
+      ScopedResource* resource = *it;
+      DCHECK(resource_provider_->CanLockForWrite(resource->id()));
+
+      if (resource->format() != format)
+        continue;
+      if (resource->size() != size)
+        continue;
+
+      // Transfer resource to |in_use_resources_|.
+      in_use_resources_.set(resource->id(), unused_resources_.take(it));
+      in_use_memory_usage_bytes_ += ResourceUtil::UncheckedSizeInBytes<size_t>(
+          resource->size(), resource->format());
+      return resource;
+    }
   }
 
   scoped_ptr<PoolResource> pool_resource =
@@ -133,10 +138,16 @@ Resource* ResourcePool::AcquireResource(const gfx::Size& size,
 Resource* ResourcePool::TryAcquireResourceWithContentId(uint64_t content_id) {
   DCHECK(content_id);
 
+  TRACE_EVENT_BEGIN1("cc, pras", "ResourcePool::TryAcquireResource",
+                     "total_unused", unused_resources_.size());
+
   auto it = std::find_if(unused_resources_.begin(), unused_resources_.end(),
                          [content_id](const PoolResource* pool_resource) {
                            return pool_resource->content_id() == content_id;
                          });
+
+  TRACE_EVENT_END0("cc, pras", "ResourcePool::TryAcquireResource");
+
   if (it == unused_resources_.end())
     return nullptr;
 
@@ -224,6 +235,7 @@ void ResourcePool::CheckBusyResources() {
 }
 
 void ResourcePool::DidFinishUsingResource(scoped_ptr<PoolResource> resource) {
+  TRACE_EVENT0("cc, pras", "ResourcePool::DidFinishUsingResource");
   unused_resources_.push_front(resource.Pass());
 }