Notify listeners on OffScreenCanvas changes

content/browser/webrtc/webrtc_capture_from_element_browsertest.cc

Index: content/browser/webrtc/webrtc_capture_from_element_browsertest.cc
diff --git a/content/browser/webrtc/webrtc_capture_from_element_browsertest.cc b/content/browser/webrtc/webrtc_capture_from_element_browsertest.cc
index 5c664973b8aac800b3ba8c0c65cbddd225eacc00..085df8f789234029093b86fc0818d9017b7cc755 100644
--- a/content/browser/webrtc/webrtc_capture_from_element_browsertest.cc
+++ b/content/browser/webrtc/webrtc_capture_from_element_browsertest.cc
@@ -63,6 +63,9 @@ class WebRtcCaptureFromElementBrowserTest
     // Allow <video>/<audio>.play() when not initiated by user gesture.
     base::CommandLine::ForCurrentProcess()->AppendSwitch(
         switches::kDisableGestureRequirementForMediaPlayback);
+    // Allow experimental canvas features.
+    base::CommandLine::ForCurrentProcess()->AppendSwitch(
+        switches::kEnableExperimentalCanvasFeatures);
   }
 
  private:
@@ -85,6 +88,12 @@ IN_PROC_BROWSER_TEST_F(WebRtcCaptureFromElementBrowserTest,
   MakeTypicalCall("testCanvasCapture(drawWebGL);", kCanvasCaptureTestHtmlFile);
 }
 
+IN_PROC_BROWSER_TEST_F(WebRtcCaptureFromElementBrowserTest,
+                       VerifyCanvasCaptureOffscreenCanvasCommitFrames) {
+  MakeTypicalCall("testCanvasCapture(drawOffscreenCanvasCommit);",
+                  kCanvasCaptureTestHtmlFile);
+}
+
 IN_PROC_BROWSER_TEST_P(WebRtcCaptureFromElementBrowserTest,
                        MAYBE_CaptureFromMediaElement) {
 #if defined(OS_ANDROID)