Attach a WebBluetooth to the LocalFrame and use it if it's available.

Source/modules/bluetooth/BluetoothSupplement.h

+// Copyright 2015 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.
+
+#ifndef BluetoothSupplement_h
+#define BluetoothSupplement_h
+
+#include "core/frame/LocalFrame.h"
+
+namespace blink {
+
+class WebBluetooth;
+
+class BLINK_EXPORT BluetoothSupplement : public NoBaseWillBeGarbageCollected<BluetoothSupplement>, public WillBeHeapSupplement<LocalFrame> {

[jochen (gone - plz use gerrit), 2015/07/15 13:45:27]

i thought stuff in modules/ already uses oilpan, so no need for WillBe types

[haraken, 2015/07/15 13:55:04]

Yeah, but this needs to be WillBe because the supplementable object (i.e.,
LocalFrame) is still WillBe. We need to drop the WillBe from the supplement
object and the supplementable object at the same time.

[Jeffrey Yasskin, 2015/07/15 17:19:32]

Thanks.

+    WTF_MAKE_NONCOPYABLE(BluetoothSupplement);
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(BluetoothSupplement);
+
+public:
+    static const char* supplementName();
+
+    static void provideTo(LocalFrame&, WebBluetooth*);
+
+    static WebBluetooth* from(LocalFrame*);
+
+    // Returns the WebBluetooth attached to the ScriptState's frame if that exists;
+    // otherwise the Platform's WebBluetooth.
+    static WebBluetooth* from(ScriptState*);
+
+    DECLARE_VIRTUAL_TRACE();
+
+private:
+    BluetoothSupplement(WebBluetooth*);

[haraken, 2015/07/15 13:55:04]

Add explicit.

[Jeffrey Yasskin, 2015/07/15 17:19:32]

Oops, done.

+
+    WebBluetooth* m_bluetooth;
+};
+
+} // namespace blink
+
+#endif // BluetoothRoutingId_h