Disable flaky Tab Capture tests

Bug: 1040894
Change-Id: Ifbc2521ab0cd6b8308b6b5da81d3f1a4a68a790d
TBR: miu@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2019345Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Commit-Queue: Guido Urdaneta <guidou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#734936}

chrome/browser/extensions/api/tab_capture/tab_capture_apitest.cc

@@ -177,7 +177,9 @@ IN_PROC_BROWSER_TEST_F(TabCaptureApiTest, MAYBE_MaxOffscreenTabs) {
 }
 
 // Tests that tab capture video frames can be received in a VIDEO element.
-IN_PROC_BROWSER_TEST_F(TabCaptureApiPixelTest, EndToEndWithoutRemoting) {
+// Flaky on all platforms. See https://crbug.com/1040894
+IN_PROC_BROWSER_TEST_F(TabCaptureApiPixelTest,
+                       DISABLED_EndToEndWithoutRemoting) {
   if (IsTooIntensiveForThisPlatform()) {
     LOG(WARNING) << "Skipping this CPU-intensive test on this platform/build.";
     return;
@@ -197,7 +199,8 @@ IN_PROC_BROWSER_TEST_F(TabCaptureApiPixelTest, EndToEndWithoutRemoting) {
 // received in a VIDEO element.  More allowance is provided for color deviation
 // because of the additional layers of video processing performed within
 // WebRTC.
-IN_PROC_BROWSER_TEST_F(TabCaptureApiPixelTest, EndToEndThroughWebRTC) {
+// Flaky on all platforms. See https://crbug.com/1040894
+IN_PROC_BROWSER_TEST_F(TabCaptureApiPixelTest, DISABLED_EndToEndThroughWebRTC) {
   if (IsTooIntensiveForThisPlatform()) {
     LOG(WARNING) << "Skipping this CPU-intensive test on this platform/build.";
     return;