Canvas Capture: chrome browsertest- added frame rate test

chrome/browser/media/chrome_webrtc_canvas_capture_browsertest.cc

+// Copyright 2016 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.
+
+#include "base/command_line.h"
+#include "base/files/file_path.h"
+#include "base/path_service.h"
+#include "build/build_config.h"
+#include "chrome/browser/media/webrtc_browsertest_base.h"
+#include "chrome/browser/media/webrtc_browsertest_common.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_tabstrip.h"
+#include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/test/base/in_process_browser_test.h"
+#include "chrome/test/base/ui_test_utils.h"
+#include "content/public/browser/notification_service.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/common/content_switches.h"
+#include "content/public/test/browser_test_utils.h"
+#include "media/base/media_switches.h"
+#include "net/test/embedded_test_server/embedded_test_server.h"
+#include "testing/perf/perf_test.h"
+#include "ui/gl/gl_switches.h"
+
+static const char kCanvasTestHtmlPage[] = "/media/canvas_capture_test.html";
+
+// Canvas Capture browser test.
+// At this time this browser test verifies that the frame rate of a stream
+// originated from a captured canvas is as expected.
+class WebRtcCanvasCaptureBrowserTest : public WebRtcTestBase {

[phoglund_chromium, 2016/02/12 08:38:53]

It doesn't make sense to inherit from WebRtcTestBase here. That class gives you
access to the small javascript library in chrome/test/data/webrtc (e.g.
getUserMedia, peer connections), none of which you use here. Just inherit from
InProcessBrowserTest.

You'll have to do without DetectErrorsInJavascript. That one was more useful to
us in the past when we had much more javascript, much of which executed in
callback functions. I don't think it will be super useful to you, and it doesn't
work anyway if the test isn't MANUAL-tagged and running on bots with sequential
execution.

[cpaulin (no longer in chrome), 2016/02/12 20:14:32]

Done.

+ public:
+  void SetUpInProcessBrowserTestFixture() override {
+    DetectErrorsInJavaScript();  // Look for errors in our rather complex js.
+  }
+
+  void SetUpCommandLine(base::CommandLine* command_line) override {
+    // The video playback will not work without a GPU, so force its use here.
+    command_line->AppendSwitch(switches::kUseGpuInTests);
+
+    command_line->AppendSwitch(
+        switches::kEnableExperimentalWebPlatformFeatures);
+  }
+};
+
+// Tests that the frame rate of the canvas capture is as expected.
+IN_PROC_BROWSER_TEST_F(WebRtcCanvasCaptureBrowserTest,
+                       VerifyCanvasCaptureFrameRate) {
+  ASSERT_TRUE(embedded_test_server()->Start());
+
+  ui_test_utils::NavigateToURL(
+      browser(), embedded_test_server()->GetURL(kCanvasTestHtmlPage));
+
+  content::WebContents* tab_contents =
+      browser()->tab_strip_model()->GetActiveWebContents();
+
+  ASSERT_EQ("OK", ExecuteJavascript("testFrameRateOfCanvasCapture();",
+                                    tab_contents));
+}