Gather serialization-related code into a directory.

third_party/WebKit/Source/bindings/bindings.gni

Index: third_party/WebKit/Source/bindings/bindings.gni
diff --git a/third_party/WebKit/Source/bindings/bindings.gni b/third_party/WebKit/Source/bindings/bindings.gni
index 0bd646452bdbd66dcd3c3f546e0c67a8dac74a59..0adad42572826151f1bcf8942389925a54ee4dc4 100644
--- a/third_party/WebKit/Source/bindings/bindings.gni
+++ b/third_party/WebKit/Source/bindings/bindings.gni
@@ -102,16 +102,10 @@ bindings_core_v8_files =
                     "core/v8/ScriptString.h",
                     "core/v8/ScriptValue.cpp",
                     "core/v8/ScriptValue.h",
-                    "core/v8/SerializationTag.h",
-                    "core/v8/SerializedScriptValue.cpp",
-                    "core/v8/SerializedScriptValue.h",
-                    "core/v8/SerializedScriptValueFactory.cpp",
-                    "core/v8/SerializedScriptValueFactory.h",
                     "core/v8/SourceLocation.cpp",
                     "core/v8/SourceLocation.h",
                     "core/v8/ToV8ForCore.cpp",
                     "core/v8/ToV8ForCore.h",
-                    "core/v8/Transferables.h",
                     "core/v8/UseCounterCallback.cpp",
                     "core/v8/UseCounterCallback.h",
                     "core/v8/V8AbstractEventListener.cpp",
@@ -180,6 +174,12 @@ bindings_core_v8_files =
                     "core/v8/WorkerV8Settings.h",
                     "core/v8/WrapperCreationSecurityCheck.h",
                     "core/v8/WrapperTypeInfo.h",
+                    "core/v8/serialization/SerializationTag.h",
+                    "core/v8/serialization/SerializedScriptValue.cpp",
+                    "core/v8/serialization/SerializedScriptValue.h",
+                    "core/v8/serialization/SerializedScriptValueFactory.cpp",
+                    "core/v8/serialization/SerializedScriptValueFactory.h",
+                    "core/v8/serialization/Transferables.h",
                     "core/v8/serialization/V8ScriptValueDeserializer.cpp",
                     "core/v8/serialization/V8ScriptValueDeserializer.h",
                     "core/v8/serialization/V8ScriptValueSerializer.cpp",
@@ -205,7 +205,6 @@ bindings_unittest_files =
                     "core/v8/ScriptPromiseTest.cpp",
                     "core/v8/ScriptStreamerTest.cpp",
                     "core/v8/ScriptWrappableVisitorTest.cpp",
-                    "core/v8/SerializedScriptValueTest.cpp",
                     "core/v8/ToV8Test.cpp",
                     "core/v8/TraceWrapperMemberTest.cpp",
                     "core/v8/V8BindingForTesting.cpp",
@@ -213,6 +212,7 @@ bindings_unittest_files =
                     "core/v8/V8BindingTest.cpp",
                     "core/v8/V8ObjectBuilderTest.cpp",
                     "core/v8/V8ScriptRunnerTest.cpp",
+                    "core/v8/serialization/SerializedScriptValueTest.cpp",
                     "core/v8/serialization/V8ScriptValueSerializerTest.cpp",
                   ],
                   "abspath")