Making callbacks in Android ChildProcessLauncher generic.

content/browser/android/gpu_process_callback.cc

+// Copyright 2017 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 "content/browser/android/gpu_process_callback.h"
+
+#include "base/android/scoped_java_ref.h"
+#include "base/android/unguessable_token_android.h"
+#include "content/browser/android/scoped_surface_request_manager.h"
+#include "content/public/browser/browser_thread.h"
+#include "gpu/ipc/common/gpu_surface_tracker.h"
+
+#include "jni/GpuProcessCallback_jni.h"
+
+namespace content {
+
+void CompleteScopedSurfaceRequest(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jclass>& clazz,
+    const base::android::JavaParamRef<jobject>& token,
+    const base::android::JavaParamRef<jobject>& surface) {
+  base::UnguessableToken requestToken =
+      base::android::UnguessableTokenAndroid::FromJavaUnguessableToken(env,
+                                                                       token);
+  if (!requestToken) {
+    DLOG(ERROR) << "Received invalid surface request token.";
+    return;
+  }
+
+  DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  base::android::ScopedJavaGlobalRef<jobject> jsurface;
+  jsurface.Reset(env, surface);
+  ScopedSurfaceRequestManager::GetInstance()->FulfillScopedSurfaceRequest(
+      requestToken, gl::ScopedJavaSurface(jsurface));
+}
+
+base::android::ScopedJavaLocalRef<jobject> GetViewSurface(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jclass>& jcaller,
+    jint surface_id) {
+  gl::ScopedJavaSurface surface_view =
+      gpu::GpuSurfaceTracker::GetInstance()->AcquireJavaSurface(surface_id);
+  return base::android::ScopedJavaLocalRef<jobject>(surface_view.j_surface());
+}
+
+bool RegisterGpuProcessCallback(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+}  // namespace content