Allow one-copy task tile worker pool to use compressed textures.

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 778ddbe853ca87dc4f194643d7c44bf62c6788bb..f1a405dd5248a1628b3e37ea3246b31d53b25945 100644
--- a/cc/resources/resource_pool.cc
+++ b/cc/resources/resource_pool.cc
@@ -92,6 +92,9 @@ ResourcePool::~ResourcePool() {
 
 Resource* ResourcePool::AcquireResource(const gfx::Size& size,
                                         ResourceFormat format) {
+  DCHECK_EQ(size.width() % 4, 0);
+  DCHECK_EQ(size.height() % 4, 0);
+
   // 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.