WebBluetooth - Remove unneeded pre-finalizer in renderer bluetooth.cc

Bug: 916654
Change-Id: I70e2f99d558c797b0d1d98cb543fdc13c866e091
Reviewed-on: https://chromium-review.googlesource.com/c/1394374Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Doug Turner <dougt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#619869}

third_party/blink/renderer/modules/bluetooth/bluetooth.cc

@@ -343,10 +343,6 @@ void Bluetooth::ContextDestroyed(ExecutionContext*) {
   client_bindings_.CloseAllBindings();
 }
 
-void Bluetooth::Dispose() {
-  DCHECK(client_bindings_.empty());
-}
-
 void Bluetooth::Trace(blink::Visitor* visitor) {
   visitor->Trace(device_instance_map_);
   EventTargetWithInlineData::Trace(visitor);
@@ -356,6 +352,10 @@ void Bluetooth::Trace(blink::Visitor* visitor) {
 Bluetooth::Bluetooth(ExecutionContext* context)
     : ContextLifecycleObserver(context) {}
 
+Bluetooth::~Bluetooth() {
+  DCHECK(client_bindings_.empty());
+}
+
 BluetoothDevice* Bluetooth::GetBluetoothDeviceRepresentingDevice(
     mojom::blink::WebBluetoothDevicePtr device_ptr,
     ExecutionContext* context) {

third_party/blink/renderer/modules/bluetooth/bluetooth.h

@@ -22,7 +22,6 @@ class ScriptState;
 class Bluetooth final : public EventTargetWithInlineData,
                         public ContextLifecycleObserver,
                         public mojom::blink::WebBluetoothScanClient {
-  USING_PRE_FINALIZER(Bluetooth, Dispose);
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(Bluetooth);
 
@@ -32,6 +31,7 @@ class Bluetooth final : public EventTargetWithInlineData,
   }
 
   explicit Bluetooth(ExecutionContext*);
+  ~Bluetooth() override;
 
   // IDL exposed interface:
   ScriptPromise requestDevice(ScriptState*,
@@ -57,10 +57,6 @@ class Bluetooth final : public EventTargetWithInlineData,
   // ContextLifecycleObserver interface.
   void ContextDestroyed(ExecutionContext*) override;
 
-  // USING_PRE_FINALIZER interface.
-  // Called before the object gets garbage collected.
-  void Dispose();
-
   DEFINE_ATTRIBUTE_EVENT_LISTENER(advertisementreceived,
                                   kAdvertisementreceived);