[GRC] Coordination Unit Manager Modularization

services/resource_coordinator/public/cpp/coordination_unit_id.cc

Index: services/resource_coordinator/public/cpp/coordination_unit_id.cc
diff --git a/services/resource_coordinator/public/cpp/coordination_unit_id.cc b/services/resource_coordinator/public/cpp/coordination_unit_id.cc
index ed92241435916e788856675a623f576e3eb4aa2a..ea9cd5a56f5dc90f5b2186637484343b9d232301 100644
--- a/services/resource_coordinator/public/cpp/coordination_unit_id.cc
+++ b/services/resource_coordinator/public/cpp/coordination_unit_id.cc
@@ -4,32 +4,38 @@
 
 #include "services/resource_coordinator/public/cpp/coordination_unit_id.h"
 
-#include "base/logging.h"
 #include "base/numerics/safe_conversions.h"
+#include "base/unguessable_token.h"
 #include "third_party/smhasher/src/MurmurHash2.h"
 
 namespace resource_coordinator {
 
+namespace {
+
 // The seed to use when taking the murmur2 hash of the id.
 const uint64_t kMurmur2HashSeed = 0;
 
+uint64_t CreateMurmurHash64A(const std::string& id) {
+  DCHECK(base::IsValueInRangeForNumericType<int>(id.size()));
+
+  return MurmurHash64A(&id.front(), static_cast<int>(id.size()),
+                       kMurmur2HashSeed);
+}
+
+}  // namespace
+
 CoordinationUnitID::CoordinationUnitID()
     : id(0), type(CoordinationUnitType::kInvalidType) {}
 
 CoordinationUnitID::CoordinationUnitID(const CoordinationUnitType& type,
                                        const std::string& new_id)
     : type(type) {
-  DCHECK(base::IsValueInRangeForNumericType<int>(new_id.size()));
-  if (!new_id.empty()) {
-    id = MurmurHash64A(&new_id.front(), static_cast<int>(new_id.size()),
-                       kMurmur2HashSeed);
-  } else {
-    id = 0;
-  }
+  id = CreateMurmurHash64A(
+      !new_id.empty() ? new_id : base::UnguessableToken().Create().ToString());
 }
 
 CoordinationUnitID::CoordinationUnitID(const CoordinationUnitType& type,
                                        uint64_t new_id)
     : id(new_id), type(type) {}
 
-}  // resource_coordinator
+}  // namespace resource_coordinator