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/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 InProcessBrowserTest {
+ public:
+
+  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);
+  }
+
+ protected:
+  WebRtcCanvasCaptureBrowserTest() {}
+  ~WebRtcCanvasCaptureBrowserTest() override {};
+
+  std::string ExecuteJavascript(
+      const std::string& javascript,
+      content::WebContents* tab_contents) const {
+    std::string result;
+    EXPECT_TRUE(content::ExecuteScriptAndExtractString(
+        tab_contents, javascript, &result));
+    return result;
+  }
+
+ private:
+   DISALLOW_COPY_AND_ASSIGN(WebRtcCanvasCaptureBrowserTest);
+};
+
+// 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));
+}