heap mojo: migrate GampadDispatcher gamepad_haptics_manager_remote_

Use the HeapMojoRemote wrapper so that Oilpan will GC the object.

BUG=chromium:1049056

Change-Id: I387365fe5a52180547aa8c1728bc3b6c31cffcc8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2147975
Commit-Queue: Johann Koenig <johannkoenig@google.com>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Kouhei Ueno <kouhei@chromium.org>
Cr-Commit-Position: refs/heads/master@{#762737}

third_party/blink/renderer/modules/gamepad/gamepad_dispatcher.cc

@@ -43,12 +43,13 @@ void GamepadDispatcher::ResetVibrationActuator(
 GamepadDispatcher::GamepadDispatcher(ExecutionContext* context)
     :  // See https://bit.ly/2S0zRAS for task types.
       task_runner_(context ? context->GetTaskRunner(TaskType::kMiscPlatformAPI)
-                           : nullptr) {}
+                           : nullptr),
+      gamepad_haptics_manager_remote_(context) {}
 
 GamepadDispatcher::~GamepadDispatcher() = default;
 
 void GamepadDispatcher::InitializeHaptics() {
-  if (!gamepad_haptics_manager_remote_) {
+  if (!gamepad_haptics_manager_remote_.is_bound()) {
     Platform::Current()->GetBrowserInterfaceBroker()->GetInterface(
         gamepad_haptics_manager_remote_.BindNewPipeAndPassReceiver(
             task_runner_));
@@ -57,6 +58,7 @@ void GamepadDispatcher::InitializeHaptics() {
 
 void GamepadDispatcher::Trace(Visitor* visitor) {
   visitor->Trace(reader_);
+  visitor->Trace(gamepad_haptics_manager_remote_);
   PlatformEventDispatcher::Trace(visitor);
 }
 

third_party/blink/renderer/modules/gamepad/gamepad_dispatcher.h

@@ -9,10 +9,11 @@
 
 #include "base/memory/scoped_refptr.h"
 #include "device/gamepad/public/mojom/gamepad.mojom-blink.h"
-#include "mojo/public/cpp/bindings/remote.h"
 #include "third_party/blink/renderer/core/execution_context/execution_context.h"
 #include "third_party/blink/renderer/core/frame/platform_event_dispatcher.h"
 #include "third_party/blink/renderer/modules/gamepad/gamepad_listener.h"
+#include "third_party/blink/renderer/platform/mojo/heap_mojo_remote.h"
+#include "third_party/blink/renderer/platform/mojo/heap_mojo_wrapper_mode.h"
 
 namespace device {
 class Gamepad;
@@ -63,7 +64,8 @@ class GamepadDispatcher final : public GarbageCollected<GamepadDispatcher>,
 
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   Member<GamepadSharedMemoryReader> reader_;
-  mojo::Remote<device::mojom::blink::GamepadHapticsManager>
+  HeapMojoRemote<device::mojom::blink::GamepadHapticsManager,
+                 HeapMojoWrapperMode::kWithoutContextObserver>
       gamepad_haptics_manager_remote_;
 };