ImageCapture: avoid several grabFrame()s in flight, beef up content_browsertests

content/browser/webrtc/webrtc_image_capture_browsertest.cc

Index: content/browser/webrtc/webrtc_image_capture_browsertest.cc
diff --git a/content/browser/webrtc/webrtc_image_capture_browsertest.cc b/content/browser/webrtc/webrtc_image_capture_browsertest.cc
index 13603b7976c0b5afc425999a4e595cf09a1b4d19..2213c5fd6a598cec2ecb3126b0d3667791c9f60a 100644
--- a/content/browser/webrtc/webrtc_image_capture_browsertest.cc
+++ b/content/browser/webrtc/webrtc_image_capture_browsertest.cc
@@ -18,6 +18,19 @@
 #include "base/android/build_info.h"
 #endif
 
+namespace content {
+
+#if defined(OS_WIN)
+// These tests are flaky on WebRTC Windows bots: https://crbug.com/633242.
+#define MAYBE_CreateAndGetCapabilities DISABLED_CreateAndGetCapabilities
+#define MAYBE_CreateAndTakePhoto DISABLED_CreateAndTakePhoto
+#define MAYBE_CreateAndGrabFrame DISABLED_CreateAndGrabFrame
+#else
+#define MAYBE_CreateAndGetCapabilities CreateAndGetCapabilities
+#define MAYBE_CreateAndTakePhoto CreateAndTakePhoto
+#define MAYBE_CreateAndGrabFrame CreateAndGrabFrame
+#endif
+
 namespace {
 
 static const char kImageCaptureHtmlFile[] = "/media/image_capture_test.html";
@@ -32,8 +45,6 @@ static struct TargetCamera {
 
 }  // namespace
 
-namespace content {
-
 // This class is the content_browsertests for Image Capture API, which allows
 // for capturing still images out of a MediaStreamTrack. Is a
 // WebRtcWebcamBrowserTest to be able to use a physical camera.
@@ -67,74 +78,56 @@ class WebRtcImageCaptureBrowserTest
         switches::kEnableBlinkFeatures, "ImageCapture");
   }
 
- private:
-  DISALLOW_COPY_AND_ASSIGN(WebRtcImageCaptureBrowserTest);
-};
+  void SetUp() override {
+    ASSERT_TRUE(embedded_test_server()->InitializeAndListen());
+    WebRtcWebcamBrowserTest::SetUp();
+  }
 
-#if defined(OS_WIN)
-// This test is flaky on WebRTC Windows bots: https://crbug.com/633242.
-#define MAYBE_CreateAndGetCapabilities DISABLED_CreateAndGetCapabilities
-#else
-#define MAYBE_CreateAndGetCapabilities CreateAndGetCapabilities
-#endif
-IN_PROC_BROWSER_TEST_P(WebRtcImageCaptureBrowserTest,
-                       MAYBE_CreateAndGetCapabilities) {
+  // Tries to run a |command| JS test, returning true if the test can be safely
+  // skipped or it works as intended, or false otherwise.
+  bool RunImageCaptureTestCase(const std::string& command) {
 #if defined(OS_ANDROID)
-  // TODO(mcasas): fails on Lollipop devices: https://crbug.com/634811
-  if (base::android::BuildInfo::GetInstance()->sdk_int() <
-      base::android::SDK_VERSION_MARSHMALLOW) {
-    return;
-  }
+    // TODO(mcasas): fails on Lollipop devices: https://crbug.com/634811
+    if (base::android::BuildInfo::GetInstance()->sdk_int() <
+        base::android::SDK_VERSION_MARSHMALLOW) {
+      return true;
+    }
 #endif
 
-  ASSERT_TRUE(embedded_test_server()->Start());
-  GURL url(embedded_test_server()->GetURL(kImageCaptureHtmlFile));
-  NavigateToURL(shell(), url);
+    GURL url(embedded_test_server()->GetURL(kImageCaptureHtmlFile));
+    NavigateToURL(shell(), url);
+
+    if (!IsWebcamAvailableOnSystem(shell()->web_contents())) {
+      DVLOG(1) << "No video device; skipping test...";
+      return true;
+    }
 
-  if (!IsWebcamAvailableOnSystem(shell()->web_contents())) {
-    DVLOG(1) << "No video device; skipping test...";
-    return;
+    std::string result;
+    if (!ExecuteScriptAndExtractString(shell(), command, &result))
+      return false;
+    return result == "OK";
   }
 
-  std::string result;
-  ASSERT_TRUE(ExecuteScriptAndExtractString(
-      shell(), "testCreateAndGetCapabilities()", &result));
-  if (result == "OK")
-    return;
-  FAIL();
+ private:
+  DISALLOW_COPY_AND_ASSIGN(WebRtcImageCaptureBrowserTest);
+};
+
+IN_PROC_BROWSER_TEST_P(WebRtcImageCaptureBrowserTest,
+                       MAYBE_CreateAndGetCapabilities) {
+  embedded_test_server()->StartAcceptingConnections();
+  ASSERT_TRUE(RunImageCaptureTestCase("testCreateAndGetCapabilities()"));
 }
 
-#if defined(OS_WIN)
-// This test is flaky on WebRTC Windows bots: https://crbug.com/633242.
-#define MAYBE_CreateAndTakePhoto DISABLED_CreateAndTakePhoto
-#else
-#define MAYBE_CreateAndTakePhoto CreateAndTakePhoto
-#endif
 IN_PROC_BROWSER_TEST_P(WebRtcImageCaptureBrowserTest,
                        MAYBE_CreateAndTakePhoto) {
-#if defined(OS_ANDROID)
-  // TODO(mcasas): fails on Lollipop devices: https://crbug.com/634811
-  if (base::android::BuildInfo::GetInstance()->sdk_int() <
-      base::android::SDK_VERSION_MARSHMALLOW) {
-    return;
-  }
-#endif
-
-  ASSERT_TRUE(embedded_test_server()->Start());
-  GURL url(embedded_test_server()->GetURL(kImageCaptureHtmlFile));
-  NavigateToURL(shell(), url);
-
-  if (!IsWebcamAvailableOnSystem(shell()->web_contents())) {
-    DVLOG(1) << "No video device; skipping test...";
-    return;
-  }
+  embedded_test_server()->StartAcceptingConnections();
+  ASSERT_TRUE(RunImageCaptureTestCase("testCreateAndTakePhoto()"));
+}
 
-  std::string result;
-  ASSERT_TRUE(ExecuteScriptAndExtractString(shell(), "testCreateAndTakePhoto()",
-                                            &result));
-  if (result == "OK")
-    return;
-  FAIL();
+IN_PROC_BROWSER_TEST_P(WebRtcImageCaptureBrowserTest,
+                       MAYBE_CreateAndGrabFrame) {
+  embedded_test_server()->StartAcceptingConnections();
+  ASSERT_TRUE(RunImageCaptureTestCase("testCreateAndGrabFrame()"));
 }
 
 INSTANTIATE_TEST_CASE_P(,