Mojo framework for AndroidOverlay.

content/public/android/java/src/org/chromium/content/browser/androidoverlay/AndroidOverlayProviderImpl.java

Index: content/public/android/java/src/org/chromium/content/browser/androidoverlay/AndroidOverlayProviderImpl.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/androidoverlay/AndroidOverlayProviderImpl.java b/content/public/android/java/src/org/chromium/content/browser/androidoverlay/AndroidOverlayProviderImpl.java
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@@ -0,0 +1,67 @@
+// 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.
+
+package org.chromium.content.browser.androidoverlay;
+
+import android.content.Context;
+
+import org.chromium.media.mojom.AndroidOverlayClient;
+import org.chromium.media.mojom.AndroidOverlayConfig;
+import org.chromium.media.mojom.AndroidOverlayProvider;
+import org.chromium.mojo.system.MojoException;
+import org.chromium.services.service_manager.InterfaceFactory;
+
+/**
+ * Default impl of AndroidOverlayProvider.  Creates AndroidOverlayImpls.
+ */
+public class AndroidOverlayProviderImpl implements AndroidOverlayProvider {
+    private static final String TAG = "AndroidOverlayProvider";
+
+    // Count of outstanding overlays.
+    private static int sOverlayCount;
+
+    /**
+     * Create an overlay matching |config| and send it to |client|.  Remember that potentially many
+     * providers are created.  That's why we use statics.  Yes, our factory might provide a
+     * singleton to the 'real' factory or state, but right now we keep very little state.
+     */
+    public void createOverlay(AndroidOverlayClient client, AndroidOverlayConfig config) {
+        // Limit the number of overlays.
+        if (sOverlayCount > 0) {
+            client.onDestroyed();
+            return;
+        }
+
+        sOverlayCount++;
+        AndroidOverlayImpl overlay = new AndroidOverlayImpl(client, config);
+        client.onInitialized(overlay);
+    }
+
+    @Override
+    public void close() {}
+
+    @Override
+    public void onConnectionError(MojoException e) {}
+
+    /**
+     * Called when an overlay that we've created is destroyed.  Remember than an overlay may
+     * outlive the provider that created it.
+     */
+    public static void onOverlayClosed(AndroidOverlayImpl overlay) {
+        sOverlayCount--;
+    }
+
+    /**
+     * Mojo factory.
+     */
+    public static class Factory implements InterfaceFactory<AndroidOverlayProvider> {
+        public Factory(Context context) {}
+
+        @Override
+        public AndroidOverlayProvider createImpl() {
+            // TODO(liberato): Replace statics with singleton.
+            return new AndroidOverlayProviderImpl();
+        }
+    }
+}