Update VP8 settings to avoid spending bitrate on static areas. PERF NOTE

webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc

Index: webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
diff --git a/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc b/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
index 651406abf91d0c01f5eebaf7adb5bbe7d013e2ea..01c610caf28563abfc9fbb2e346ae86834e5ac6c 100644
--- a/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
+++ b/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
@@ -664,7 +664,7 @@ int VP8EncoderImpl::InitAndSetControlSettings() {
                       denoiser_state : kDenoiserOff);
   }
   for (size_t i = 0; i < encoders_.size(); ++i) {
-    vpx_codec_control(&(encoders_[i]), VP8E_SET_STATIC_THRESHOLD, 1);
+    vpx_codec_control(&(encoders_[i]), VP8E_SET_STATIC_THRESHOLD, 300);

[marpan, 2015/09/30 15:45:30]

condition this change only for screen_content_mode for now..

[sprang_webrtc, 2015/10/01 11:17:03]

Done.

     vpx_codec_control(&(encoders_[i]), VP8E_SET_CPUUSED, cpu_speed_[i]);
     vpx_codec_control(&(encoders_[i]), VP8E_SET_TOKEN_PARTITIONS,
                       static_cast<vp8e_token_partitions>(token_partitions_));