DialogSurfaceManager implementation.

content/public/android/java/src/org/chromium/content/browser/DialogSurfaceActivityMapper.java

+// 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.
+
+package org.chromium.content.browser;
+
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.view.ViewGroup;
+
+import org.chromium.base.Log;
+import org.chromium.base.annotations.CalledByNative;
+import org.chromium.media.IDialogSurfaceActivityMapper;
+import org.chromium.media.IDialogSurfaceHolder;
+
+/**
+ * Implementation of IDialogSurfaceActivityMapper.
+ * Provided by ChildProcessLauncher to DialogSurfaceManager.
+ */
+public class DialogSurfaceActivityMapper extends IDialogSurfaceActivityMapper.Stub {

[boliu, 2016/11/04 00:07:19]

@JNINamespace("content") so native side can live in content namespace

[liberato (no reviews please), 2016/11/11 21:52:35]

Done.

+    private static final String TAG = "cr_DialogSurfaceAM";
+
+    @Override
+    public void postWindowToken(int rendererPid, int renderFrameId, IDialogSurfaceHolder holder) {

[boliu, 2016/11/04 00:07:19]

I didn't find the caller of this binder call? wanted to ensure pid can't be
faked

[liberato (no reviews please), 2016/11/11 21:52:35]

i split this cl in half, and the caller isn't here.

pid can be faked.  i'm in the process of replacing with UnguessableToken.  at
the time this was written, UnguessableToken wasn't ready yet.  i've got java
bindings for it out in a separate CL.

+        nativeCallBackWithContentViewCore(rendererPid, renderFrameId, this, holder);
+    }
+
+    /**
+     * Receive a callback from native with a previously requested ContentViewCore.
+     */
+    @CalledByNative
+    private void onContentViewCore(IDialogSurfaceHolder holder, ContentViewCore cvc) {
+        IBinder token = null;
+
+        if (cvc != null) {
+            ViewGroup viewGroup = cvc.getContainerView();
+            if (viewGroup != null) {
+                token = viewGroup.getWindowToken();
+            }
+        }
+
+        try {
+            holder.onWindowToken(token);
+        } catch (RemoteException e) {
+            Log.e(TAG, "Unable to post window token to DialogSurfaceHolder", e);

[boliu, 2016/11/04 00:07:19]

Log.d (to avoid bloating release binary)

[liberato (no reviews please), 2016/11/11 21:52:35]

Done.

+        }
+    }
+
+    // Look up the ContentViewCore for (rendererPid, renderFrameId), and call
+    // back onContentViewCore with it and |holder|.  The callback will happen
+    // on the browser UI thread.
+    private static native void nativeCallBackWithContentViewCore(int rendererPid, int renderFrameId,
+            DialogSurfaceActivityMapper mapper, IDialogSurfaceHolder holder);
+}