[aw] Software mode tests for fullscreen API.

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 d13195c5b0a0607d7fe5658abb8144fb0dd99bbe..4d8b2759200d33adf714d93891b2272a5efa43f7 100644
--- a/android_webview/java/src/org/chromium/android_webview/AwContentViewClient.java
+++ b/android_webview/java/src/org/chromium/android_webview/AwContentViewClient.java
@@ -66,8 +66,12 @@ public class AwContentViewClient extends ContentViewClient implements ContentVid
 
     @Override
     public void enterFullscreenVideo(View videoView) {
-        // enterFullscreenVideo will only be called after enterFullscreen.
-        assert mCustomView != null;
+        if (mCustomView == null) {
+            // enterFullscreenVideo will only be called after enterFullscreen, but
+            // in this case exitFullscreen has been invoked in between them.
+            // TODO(igsolla): Fix http://crbug/425926 and replace with assert.
+            return;
+        }
         mCustomView.addView(videoView, 0);
     }