Geometry: Reimplement DOMPoint using V8 extras.

third_party/WebKit/Source/bindings/core/v8/GeometryInterfaces.cpp

+// Copyright 2016 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 "bindings/core/v8/GeometryInterfaces.h"
+
+#include "bindings/core/v8/V8ScriptRunner.h"
+
+namespace blink {
+
+ScriptValue GeometryInterfaces::createDOMPoint(double x, double y, double z, double w)
+{
+    v8::Isolate* isolate = v8::Isolate::GetCurrent();

[haraken, 2016/02/25 11:21:10]

v8::Isolate::GetCurrent() is deprecated.

You should pass in the ScriptState from touchPositionAdjustedToBestClickableNode
(you can get the ScriptState by adding [CallWith=ScriptState] to the IDL file)
down to this method.

+    v8::HandleScope scope(isolate);

[haraken, 2016/02/25 11:21:10]

This shouldn't be needed. If GeometryInterfaces::createDOMPoint is called in a
state where it doesn't have a HandleScope, it's a bug.

+
+    v8::Local<v8::Value> args[] = {
+        v8::Number::New(isolate, x),
+        v8::Number::New(isolate, y),
+        v8::Number::New(isolate, z),
+        v8::Number::New(isolate, w)
+    };
+    ScriptState* scriptState = ScriptState::current(isolate);
+    return ScriptValue(scriptState, V8ScriptRunner::callExtraOrCrash(scriptState, "createDOMPoint", args));
+}
+
+void GeometryInterfaces::updateDOMPoint(ScriptValue& scriptValue, double x, double y, double z, double w)

[haraken, 2016/02/25 11:21:10]

scriptValue => eyeTranslation ?

+{
+    v8::Isolate* isolate = v8::Isolate::GetCurrent();

[haraken, 2016/02/25 11:21:10]

Remove this.

+    v8::HandleScope scope(isolate);

[haraken, 2016/02/25 11:21:10]

Remove this.

+
+    v8::Local<v8::Value> args[] = {
+        scriptValue.v8Value(),
+        v8::Number::New(isolate, x),
+        v8::Number::New(isolate, y),
+        v8::Number::New(isolate, z),
+        v8::Number::New(isolate, w)
+    };
+    ScriptState* scriptState = ScriptState::current(isolate);

[haraken, 2016/02/25 11:21:10]

With this, you'll end up with using a wrong ScriptState because it's not
guaranteed that you're in a correct context when you call
GeometryInterfaces::updateDOMPoint.

You must use scriptValue.scriptState() instead.

+    V8ScriptRunner::callExtraOrCrash(scriptState, "updateDOMPoint", args);
+}
+
+} // namespace blink