Enable the embedded L1/EME support in WebView.

android_webview/java/src/org/chromium/android_webview/AwContentViewClient.java

Index: android_webview/java/src/org/chromium/android_webview/AwContentViewClient.java
diff --git a/android_webview/java/src/org/chromium/android_webview/AwContentViewClient.java b/android_webview/java/src/org/chromium/android_webview/AwContentViewClient.java
index 6ed4911ffaf2dae142ec0c2946e315b850d401c3..0e281851184aeda0a4aa778da4c6723cc7c5857c 100644
--- a/android_webview/java/src/org/chromium/android_webview/AwContentViewClient.java
+++ b/android_webview/java/src/org/chromium/android_webview/AwContentViewClient.java
@@ -5,6 +5,7 @@
 package org.chromium.android_webview;
 
 import android.content.Context;
+import android.graphics.RectF;
 import android.view.KeyEvent;
 import android.view.View;
 import android.webkit.URLUtil;
@@ -13,6 +14,7 @@ import android.webkit.WebChromeClient;
 import org.chromium.content.browser.ContentVideoView;
 import org.chromium.content.browser.ContentVideoViewClient;
 import org.chromium.content.browser.ContentViewClient;
+import org.chromium.content.browser.ContentViewCore;
 
 /**
  * ContentViewClient implementation for WebView
@@ -46,6 +48,8 @@ public class AwContentViewClient extends ContentViewClient {
 
     private AwContentsClient mAwContentsClient;
     private AwSettings mAwSettings;
+    private ContentViewCore mContentViewCore;
+    private ExternalVideoSurfaceContainer mExternalVideoSurfaceContainer;
 
     public AwContentViewClient(AwContentsClient awContentsClient, AwSettings awSettings) {
         mAwContentsClient = awContentsClient;
@@ -83,4 +87,48 @@ public class AwContentViewClient extends ContentViewClient {
         return mAwSettings != null ?
                 mAwSettings.getBlockNetworkLoads() && URLUtil.isNetworkUrl(url) : true;
     }
+
+    public void setContentViewCore(ContentViewCore contentViewCore) {
+        mContentViewCore = contentViewCore;
+        if (mExternalVideoSurfaceContainer != null) {
+            mExternalVideoSurfaceContainer.releaseCurrentExternalVideoSurface();
+            mExternalVideoSurfaceContainer = null;
+        }
+    }
+
+    @Override
+    public void onRequestExternalVideoSurface(int playerId) {
+        if (mExternalVideoSurfaceContainer == null) {
+            mExternalVideoSurfaceContainer = new ExternalVideoSurfaceContainer(mContentViewCore);
+        }
+        mExternalVideoSurfaceContainer.requestExternalVideoSurface(playerId);
+    }
+
+    @Override
+    public void onReleaseExternalVideoSurface(int playerId) {
+        // mExternalVideoSurfaceContainer can be null in case that setContentViewCore() is called
+        // twice in a pop up webview.
+        if (mExternalVideoSurfaceContainer != null) {
+            mExternalVideoSurfaceContainer.releaseExternalVideoSurface(playerId);
+        }
+    }
+
+    @Override
+    public void onExternalVideoSurfacePositionChanged(int playerId, RectF rect) {
+        // mExternalVideoSurfaceContainer can be null in case that setContentViewCore() is called
+        // twice in a pop up webview.
+        if (mExternalVideoSurfaceContainer != null) {
+            mExternalVideoSurfaceContainer.notifyExternalVideoSurfacePositionChanged(
+                    playerId, rect);
+        }
+    }
+
+    @Override
+    public void onExternalVideoSurfaceRenderCoordinatesChanged() {
+        // mExternalVideoSurfaceContainer can be null in case that setContentViewCore() is called
+        // twice in a pop up webview.
+        if (mExternalVideoSurfaceContainer != null) {
+            mExternalVideoSurfaceContainer.notifyExternalVideoSurfaceRenderCoordinatesChanged();
+        }
+    }
 }