Add support for ManagedMemoryPolicy (de)serialization

cc/output/managed_memory_policy.cc

Index: cc/output/managed_memory_policy.cc
diff --git a/cc/output/managed_memory_policy.cc b/cc/output/managed_memory_policy.cc
index d46790d5fefb592f6a8a15f2426d860b091c96be..f7ed2149bcc3b369981d0bd78f148868eadfdce3 100644
--- a/cc/output/managed_memory_policy.cc
+++ b/cc/output/managed_memory_policy.cc
@@ -5,6 +5,8 @@
 #include "cc/output/managed_memory_policy.h"
 
 #include "base/logging.h"
+#include "cc/proto/gpu_conversions.h"
+#include "cc/proto/managed_memory_policy.pb.h"
 
 namespace cc {
 
@@ -41,6 +43,21 @@ bool ManagedMemoryPolicy::operator!=(const ManagedMemoryPolicy& other) const {
   return !(*this == other);
 }
 
+void ManagedMemoryPolicy::ToProtobuf(proto::ManagedMemoryPolicy* proto) const {
+  proto->set_bytes_limit_when_visible(bytes_limit_when_visible);
+  proto->set_priority_cutoff_when_visible(
+      MemoryAllocationPriorityCutoffToProto(priority_cutoff_when_visible));
+  proto->set_num_resources_limit(num_resources_limit);
+}
+
+void ManagedMemoryPolicy::FromProtobuf(
+    const proto::ManagedMemoryPolicy& proto) {
+  bytes_limit_when_visible = proto.bytes_limit_when_visible();
+  priority_cutoff_when_visible = MemoryAllocationPriorityCutoffFromProto(
+      proto.priority_cutoff_when_visible());
+  num_resources_limit = proto.num_resources_limit();
+}
+
 // static
 TileMemoryLimitPolicy
 ManagedMemoryPolicy::PriorityCutoffToTileMemoryLimitPolicy(