Revert of Change default minimum screencast frame rate to zero.

content/renderer/media/media_stream_constraints_util_video_content_unittest.cc

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/media/media_stream_constraints_util_video_content.h"
 
 #include <cmath>
 #include <string>
 
 #include "content/common/media/media_stream_options.h"
 #include "content/renderer/media/mock_constraint_factory.h"
 #include "media/base/limits.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/public/platform/WebMediaConstraints.h"
 
 namespace content {
 
 namespace {
 
 void CheckNonResolutionDefaults(const VideoCaptureSettings& result) {
   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) {
   EXPECT_EQ(kDefaultScreenCastHeight, result.Height());
   EXPECT_EQ(kDefaultScreenCastWidth, result.Width());
   EXPECT_EQ(base::Optional<bool>(), result.noise_reduction());
   EXPECT_EQ(std::string(), result.device_id());
 }
 
 void CheckTrackAdapterSettingsEqualsFormat(const VideoCaptureSettings& result) {
@@ skipping 125 matching lines @@
             result.failed_constraint_name());
 
   constraint_factory_.Reset();
   constraint_factory_.basic().frame_rate.SetMin(kMaxScreenCastFrameRate + 0.1);
   result = SelectSettings();
   EXPECT_FALSE(result.HasValue());
   EXPECT_EQ(constraint_factory_.basic().frame_rate.GetName(),
             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(),
             result.failed_constraint_name());
 }
 
 // The "Mandatory" and "Ideal" tests check that various selection criteria work
 // for each individual constraint in the basic constraint set.
 TEST_F(MediaStreamConstraintsUtilVideoContentTest, MandatoryDeviceID) {
   const std::string kDeviceID = "Some ID";
@@ skipping 1882 matching lines @@
     // Only specifying a maximum resolution allows resolution adjustment.
     EXPECT_EQ(media::RESOLUTION_POLICY_ANY_WITHIN_LIMIT,
               result.ResolutionChangePolicy());
     EXPECT_EQ(1.0 / 4000, result.track_adapter_settings().min_aspect_ratio);
     EXPECT_EQ(4000.0, result.track_adapter_settings().max_aspect_ratio);
     CheckTrackAdapterSettingsEqualsFormat(result);
   }
 }
 
 }  // namespace content