Fix timestamp sent from CanvasCaptureHandler & make thread checkers clear

content/renderer/media/canvas_capture_handler_unittest.cc

Index: content/renderer/media/canvas_capture_handler_unittest.cc
diff --git a/content/renderer/media/canvas_capture_handler_unittest.cc b/content/renderer/media/canvas_capture_handler_unittest.cc
index 8c449a3c4c56b5dab28ed43fb83a4b83792ea3b4..e17ffc641a061a1f98f9d39fe789c4f77f60d83a 100644
--- a/content/renderer/media/canvas_capture_handler_unittest.cc
+++ b/content/renderer/media/canvas_capture_handler_unittest.cc
@@ -100,6 +100,8 @@ class CanvasCaptureHandlerTest : public TestWithParam<bool> {
     else
       EXPECT_EQ(media::PIXEL_FORMAT_YV12A, video_frame->format());
 
+    EXPECT_EQ(video_frame->timestamp().InMilliseconds(),

[Lei Zhang, 2016/03/10 21:44:02]

This has been failing on memory.fyi bots, e.g.

https://build.chromium.org/p/chromium.memory.fyi/builders/Chromium%20OS%20%28...

+              (estimated_capture_time - base::TimeTicks()).InMilliseconds());
     const gfx::Size& size = video_frame->coded_size();
     EXPECT_EQ(kTestCanvasCaptureFrameWidth, size.width());
     EXPECT_EQ(kTestCanvasCaptureFrameHeight, size.height());