android: Enable media autoplay for webview test shell

android_webview/test/shell/src/org/chromium/android_webview/shell/AwShellActivity.java

Index: android_webview/test/shell/src/org/chromium/android_webview/shell/AwShellActivity.java
diff --git a/android_webview/test/shell/src/org/chromium/android_webview/shell/AwShellActivity.java b/android_webview/test/shell/src/org/chromium/android_webview/shell/AwShellActivity.java
index 0e6070b8b2d796555627a188147140b7dcfd5835..69a170399a836bae69f1845aa89a4bfe2992271c 100644
--- a/android_webview/test/shell/src/org/chromium/android_webview/shell/AwShellActivity.java
+++ b/android_webview/test/shell/src/org/chromium/android_webview/shell/AwShellActivity.java
@@ -129,6 +129,8 @@ public class AwShellActivity extends Activity {
         }
         final AwSettings awSettings = new AwSettings(this /*context*/,
                 false /*isAccessFromFileURLsGrantedByDefault*/, true /*supportsLegacyQuirks*/);
+        // Required for WebGL conformance tests.
+        awSettings.setMediaPlaybackRequiresUserGesture(false);
         testContainerView.initialize(new AwContents(mBrowserContext, testContainerView,
                 testContainerView.getContext(), testContainerView.getInternalAccessDelegate(),
                 testContainerView.getNativeGLDelegate(), awContentsClient, awSettings));