Move V8-based serialization into dedicated classes and add support for ArrayBuffer transfer.

third_party/WebKit/Source/bindings/core/v8/ScriptValueSerializer.h

Index: third_party/WebKit/Source/bindings/core/v8/ScriptValueSerializer.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/ScriptValueSerializer.h b/third_party/WebKit/Source/bindings/core/v8/ScriptValueSerializer.h
index 55bfef6630fc5ef1306b6a30e55f60a16ee5292b..8b1d67030b2f4a879d4e0117f85fe862693874f2 100644
--- a/third_party/WebKit/Source/bindings/core/v8/ScriptValueSerializer.h
+++ b/third_party/WebKit/Source/bindings/core/v8/ScriptValueSerializer.h
@@ -483,14 +483,10 @@ public:
     bool readVersion(uint32_t& version);
     void setVersion(uint32_t);
 
-    // Used to extract the underlying buffer, in order to bypass
-    // SerializedScriptValueReader.
-    const uint8_t* buffer() const { return m_buffer; }
-    unsigned length() const { return m_length; }
-
 protected:
     v8::Isolate* isolate() const { return m_scriptState->isolate(); }
     v8::Local<v8::Context> context() const { return m_scriptState->context(); }
+    unsigned length() const { return m_length; }
     unsigned position() const { return m_position; }
 
     const uint8_t* allocate(uint32_t size)