Add some unit tests to vie_encoder.

webrtc/video/vie_encoder.cc

Index: webrtc/video/vie_encoder.cc
diff --git a/webrtc/video/vie_encoder.cc b/webrtc/video/vie_encoder.cc
index ecf3a547ee74af7fbb7fad7ad753837c3e4b026f..621697b23536186516989d0ff1d5384b3cc71d76 100644
--- a/webrtc/video/vie_encoder.cc
+++ b/webrtc/video/vie_encoder.cc
@@ -213,9 +213,8 @@ class ViEEncoder::VideoSourceProxy {
     // Called on the encoder task queue.
     rtc::CritScope lock(&crit_);
     if (!IsResolutionScalingEnabledLocked()) {
-      // This can happen since |degradation_preference_| is set on
-      // libjingle's worker thread but the adaptation is done on the encoder
-      // task queue.
+      // This can happen since |degradation_preference_| is set on libjingle's
+      // worker thread but the adaptation is done on the encoder task queue.
       return;
     }
     // The input video frame size will have a resolution with less than or
@@ -234,9 +233,8 @@ class ViEEncoder::VideoSourceProxy {
     // Called on the encoder task queue.
     rtc::CritScope lock(&crit_);
     if (!IsFramerateScalingEnabledLocked()) {
-      // This can happen since |degradation_preference_| is set on
-      // libjingle's worker thread but the adaptation is done on the encoder
-      // task queue.
+      // This can happen since |degradation_preference_| is set on libjingle's
+      // worker thread but the adaptation is done on the encoder task queue.
       return;
     }
     // The input video frame rate will be scaled down to 2/3 of input fps,
@@ -251,9 +249,8 @@ class ViEEncoder::VideoSourceProxy {
   void RequestHigherResolutionThan(int pixel_count) {
     rtc::CritScope lock(&crit_);
     if (!IsResolutionScalingEnabledLocked()) {
-      // This can happen since |degradation_preference_| is set on
-      // libjingle's worker thread but the adaptation is done on the encoder
-      // task queue.
+      // This can happen since |degradation_preference_| is set on libjingle's
+      // worker thread but the adaptation is done on the encoder task queue.
       return;
     }
 
@@ -280,9 +277,8 @@ class ViEEncoder::VideoSourceProxy {
     // Called on the encoder task queue.
     rtc::CritScope lock(&crit_);
     if (!IsFramerateScalingEnabledLocked()) {
-      // This can happen since |degradation_preference_| is set on
-      // libjingle's worker thread but the adaptation is done on the encoder
-      // task queue.
+      // This can happen since |degradation_preference_| is set on libjingle's
+      // worker thread but the adaptation is done on the encoder task queue.
       return;
     }
     if (framerate_fps == std::numeric_limits<int>::max()) {