cc: Use CheckedNumeric for resource size calculations.

cc/resources/resource_pool.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/resources/resource_pool.h"
 
 #include "cc/resources/resource_provider.h"
 #include "cc/resources/scoped_resource.h"
 
 namespace cc {
@@ skipping 29 matching lines @@
        ++it) {
     ScopedResource* resource = it->resource;
     DCHECK(resource_provider_->CanLockForWrite(resource->id()));
 
     if (resource->format() != format)
       continue;
     if (resource->size() != size)
       continue;
 
     unused_resources_.erase(it);
-    unused_memory_usage_bytes_ -= resource->bytes();
+    unused_memory_usage_bytes_ -=
+        Resource::UncheckedMemorySizeBytes(size, format);
     return make_scoped_ptr(resource);
   }
 
   scoped_ptr<ScopedResource> resource =
       ScopedResource::Create(resource_provider_);
   resource->AllocateManaged(size, target_, format);
 
-  memory_usage_bytes_ += resource->bytes();
+  DCHECK(Resource::VerifySizeInBytes(resource->size(), resource->format()));
+  memory_usage_bytes_ +=
+      Resource::UncheckedMemorySizeBytes(resource->size(), resource->format());
   ++resource_count_;
   return resource.Pass();
 }
 
 scoped_ptr<ScopedResource> ResourcePool::TryAcquireResourceWithContentId(
     uint64_t content_id) {
   DCHECK(content_id);
 
   auto it = std::find_if(unused_resources_.begin(), unused_resources_.end(),
                          [content_id](const PoolResource& pool_resource) {
                            return pool_resource.content_id == content_id;
                          });
   if (it == unused_resources_.end())
     return nullptr;
 
   ScopedResource* resource = it->resource;
   DCHECK(resource_provider_->CanLockForWrite(resource->id()));
 
   unused_resources_.erase(it);
-  unused_memory_usage_bytes_ -= resource->bytes();
+  unused_memory_usage_bytes_ -=
+      Resource::UncheckedMemorySizeBytes(resource->size(), resource->format());
   return make_scoped_ptr(resource);
 }
 
 void ResourcePool::ReleaseResource(scoped_ptr<ScopedResource> resource,
                                    uint64_t content_id) {
   busy_resources_.push_back(PoolResource(resource.release(), content_id));
 }
 
 void ResourcePool::SetResourceUsageLimits(size_t max_memory_usage_bytes,
                                           size_t max_unused_memory_usage_bytes,
@@ skipping 12 matching lines @@
 
     // LRU eviction pattern. Most recently used might be blocked by
     // a read lock fence but it's still better to evict the least
     // recently used as it prevents a resource that is hard to reuse
     // because of unique size from being kept around. Resources that
     // can't be locked for write might also not be truly free-able.
     // We can free the resource here but it doesn't mean that the
     // memory is necessarily returned to the OS.
     ScopedResource* resource = unused_resources_.front().resource;
     unused_resources_.pop_front();
-    memory_usage_bytes_ -= resource->bytes();
-    unused_memory_usage_bytes_ -= resource->bytes();
+    size_t resource_bytes = Resource::UncheckedMemorySizeBytes(
+        resource->size(), resource->format());
+    memory_usage_bytes_ -= resource_bytes;
+    unused_memory_usage_bytes_ -= resource_bytes;
     --resource_count_;
     delete resource;
   }
 }
 
 bool ResourcePool::ResourceUsageTooHigh() {
   if (resource_count_ > max_resource_count_)
     return true;
   if (memory_usage_bytes_ > max_memory_usage_bytes_)
     return true;
@@ skipping 15 matching lines @@
       DidFinishUsingResource(resource, it->content_id);
       it = busy_resources_.erase(it);
     } else {
       ++it;
     }
   }
 }
 
 void ResourcePool::DidFinishUsingResource(ScopedResource* resource,
                                           uint64_t content_id) {
-  unused_memory_usage_bytes_ += resource->bytes();
+  unused_memory_usage_bytes_ +=
+      Resource::UncheckedMemorySizeBytes(resource->size(), resource->format());
   unused_resources_.push_back(PoolResource(resource, content_id));
 }
 
 }  // namespace cc