Add "exact" constraint evaluation to video picker.

content/renderer/media/media_stream_constraints_util_unittest.cc

 // Copyright 2014 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 <string>
 
 #include "content/renderer/media/media_stream_audio_processor_options.h"
 #include "content/renderer/media/media_stream_constraints_util.h"
 #include "content/renderer/media/media_stream_video_source.h"
 #include "content/renderer/media/mock_constraint_factory.h"
@@ skipping 71 matching lines @@
   const int test_value = 327;
 
   constraint_factory.basic().width.setExact(test_value);
   blink::WebMediaConstraints constraints =
       constraint_factory.CreateWebMediaConstraints();
 
   int value;
   EXPECT_TRUE(GetConstraintValueAsInteger(
       constraints, &blink::WebMediaTrackConstraintSet::width, &value));
   EXPECT_EQ(test_value, value);
+
+  // An exact value should also be reflected as min and max.
+  EXPECT_TRUE(GetConstraintMaxAsInteger(
+      constraints, &blink::WebMediaTrackConstraintSet::width, &value));
+  EXPECT_EQ(test_value, value);
+  EXPECT_TRUE(GetConstraintMinAsInteger(
+      constraints, &blink::WebMediaTrackConstraintSet::width, &value));
+  EXPECT_EQ(test_value, value);
 }
 
 }  // namespace content