Revert of Change default minimum screencast frame rate to zero.

content/renderer/media/media_stream_constraints_util_video_content_unittest.cc

Index: content/renderer/media/media_stream_constraints_util_video_content_unittest.cc
diff --git a/content/renderer/media/media_stream_constraints_util_video_content_unittest.cc b/content/renderer/media/media_stream_constraints_util_video_content_unittest.cc
index c31bef3d89af2af4ffa1959e8c86f1ac777e20cb..ae8ac1e670d31b00c5ad844e8621ab7fcbb6ef28 100644
--- a/content/renderer/media/media_stream_constraints_util_video_content_unittest.cc
+++ b/content/renderer/media/media_stream_constraints_util_video_content_unittest.cc
@@ -21,7 +21,6 @@
   EXPECT_EQ(kDefaultScreenCastFrameRate, result.FrameRate());
   EXPECT_EQ(base::Optional<bool>(), result.noise_reduction());
   EXPECT_EQ(std::string(), result.device_id());
-  EXPECT_EQ(0.0, result.min_frame_rate());
 }
 
 void CheckNonFrameRateDefaults(const VideoCaptureSettings& result) {
@@ -167,7 +166,7 @@
             result.failed_constraint_name());
 
   constraint_factory_.Reset();
-  constraint_factory_.basic().frame_rate.SetMax(-0.1);
+  constraint_factory_.basic().frame_rate.SetMax(kMinScreenCastFrameRate - 0.1);
   result = SelectSettings();
   EXPECT_FALSE(result.HasValue());
   EXPECT_EQ(constraint_factory_.basic().frame_rate.GetName(),