Fire CanPlayThrough immediately for local and streaming media files

media/base/download_rate_monitor_unittest.cc

Index: media/base/download_rate_monitor_unittest.cc
diff --git a/media/base/download_rate_monitor_unittest.cc b/media/base/download_rate_monitor_unittest.cc
index 787a5b4a96f471e6be4d0dcf80589f7defde004a..2272bf3d92fe9f4c113f3aa9ee83039c5b39b034 100644
--- a/media/base/download_rate_monitor_unittest.cc
+++ b/media/base/download_rate_monitor_unittest.cc
@@ -132,6 +132,19 @@ TEST_F(DownloadRateMonitorTest, MediaIsLoaded) {
   SimulateNetwork(1, 0, 0, 1000, 10);
 }
 
+// Test the MediaStream object, e.g. video capture.
+TEST_F(DownloadRateMonitorTest, IsMediaStream) {
+  static const int media_bitrate = 1024 * 1024 * 8;
+
+  monitor_.set_media_stream(true);
+
+  // Simulate no data downloaded (as if source is a local webcam).
+  EXPECT_CALL(*this, CanPlayThrough());
+  monitor_.Start(base::Bind(&DownloadRateMonitorTest::CanPlayThrough,
+                            base::Unretained(this)), media_bitrate);
+  SimulateNetwork(1, 0, 0, 1000, 10);
+}
+
 TEST_F(DownloadRateMonitorTest, VeryFastDownloadRate) {
   static const int media_bitrate = 1024 * 1024 * 8;