DialogSurfaceManager implementation.

media/base/android/dialog_surface_manager.cc

+// 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 "media/base/android/dialog_surface_manager.h"
+
+#include <algorithm>
+#include <limits>
+#include <memory>
+#include <utility>
+
+#include "base/android/build_info.h"
+#include "base/android/jni_android.h"
+#include "base/android/jni_array.h"
+#include "base/android/jni_string.h"
+#include "base/android/unguessable_token_android.h"
+#include "base/logging.h"
+#include "base/numerics/safe_conversions.h"
+#include "base/strings/string_util.h"
+#include "base/unguessable_token.h"
+#include "gpu/ipc/common/android/dialog_surface_lookup.h"
+#include "jni/DialogSurfaceManagerWrapper_jni.h"
+#include "media/base/bit_reader.h"
+#include "media/base/decrypt_config.h"
+
+using base::android::AttachCurrentThread;
+using base::android::ConvertJavaStringToUTF8;
+using base::android::ConvertUTF8ToJavaString;
+using base::android::JavaIntArrayToIntVector;
+using base::android::ScopedJavaGlobalRef;
+using base::android::ScopedJavaLocalRef;
+
+namespace media {
+
+static base::LazyInstance<DialogSurfaceManager>::Leaky g_surface_manager =
+    LAZY_INSTANCE_INITIALIZER;
+
+DialogSurfaceManager* DialogSurfaceManager::Get() {
+  return g_surface_manager.Pointer();
+}
+
+DialogSurfaceManager::DialogSurfaceManager() {
+  JNIEnv* env = AttachCurrentThread();
+  CHECK(env);
+
+  // Get the surface manager from the browser.
+  // This can, in principle, be run in the gpu process if we send the window
+  // token from the browser.  See https://codereview.chromium.org/1967553002 .
+  // Either way, we end up with an IDialogSurfaceManager here, and we don't
+  // care whether it's local or remote.
+  ScopedJavaLocalRef<jobject> unwrapped_manager(
+      gpu::DialogSurfaceLookup::GetInstance()->GetDialogSurfaceManager());
+
+  // Wrap the manager for access from native code.
+  j_wrapped_manager_.Reset(
+      Java_DialogSurfaceManagerWrapper_wrap(env, unwrapped_manager.obj()));
+}
+
+DialogSurfaceManager::~DialogSurfaceManager() {}
+
+std::unique_ptr<DialogSurfaceHolder> DialogSurfaceManager::CreateSurface(
+    const base::UnguessableToken& frame_token,
+    const Config& config,
+    const DialogSurfaceHolder::Callback& callback) {
+  JNIEnv* env = AttachCurrentThread();
+  CHECK(env);
+
+  // TODO(liberato): wrap the callback here, and send in place of the nullptr.
+  // This was omitted for the first CL.
+
+  ScopedJavaLocalRef<jobject> frame_token_java =
+      base::android::UnguessableTokenAndroid::Create(env, frame_token);
+  if (!frame_token_java.obj())
+    return std::unique_ptr<DialogSurfaceHolder>();

[boliu, 2016/11/14 16:39:25]

nit: return nullptr

[liberato (no reviews please), 2016/12/20 17:16:38]

code was removed entirely.

+
+  ScopedJavaGlobalRef<jobject> result(
+      Java_DialogSurfaceManagerWrapper_createSurface(
+          env, j_wrapped_manager_.obj(), frame_token_java.obj(), nullptr,
+          config.rect.x(), config.rect.y(), config.rect.width(),
+          config.rect.height()));
+  // NOTE: result is always null right now.
+  std::unique_ptr<DialogSurfaceHolder> holder;
+
+  return holder;
+}
+
+}  // namespace media