Fix "unreachable code" warnings (MSVC warning 4702) in webrtc.

BUG=chromium:346399
TEST=none
R=tommi@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/10139004

Patch from Peter Kasting <pkasting@chromium.org>.

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5747 4adac7df-926f-26a2-2b94-8c16560cd09d
Adding FEC support in NetEq 4.

R=henrik.lundin@webrtc.org, turaj@webrtc.org

TEST=passes all trybots

BUG=

Review URL: https://webrtc-codereview.appspot.com/9999004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5748 4adac7df-926f-26a2-2b94-8c16560cd09d
Remove locks in SendSideBandwidthEstimation since those are only accessed while owning locks in
BitrateControllerImpl (excluding AvailableBandwidth).

 + Refactor BitrateController logic around LowRate allocation so access to SendSideBandwidthEstimation
is clear.
 + Refactor NormalRateAllocation away from OnNetworkChange.
 + Annotate BitrateController locks.

R=henrik.lundin@webrtc.org, stefan@webrtc.org
BUG=3065

Review URL: https://webrtc-codereview.appspot.com/10129004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5749 4adac7df-926f-26a2-2b94-8c16560cd09d
Fixing crash in video_render_tests in release mode.

This is a test bug. Fixed usage of assert.

BUG=1917
R=mflodman@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/9979004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5750 4adac7df-926f-26a2-2b94-8c16560cd09d
(Auto)update libjingle 63503990-> 63547048

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5751 4adac7df-926f-26a2-2b94-8c16560cd09d
Refactor in BitrateController module.
 - Move condition of 0 bps as max meaning 1gbps from SendSideBandwidthEstimation to BitrateController.
 - Remove condition on bitrate=0 meaning bandwidth estimation off as that could only happen when no observers existed
   and in which case the estimation would be ignored.
 - Add MaybeTriggerOnNetworkChanged which only runs rate allocation if any of the dependent variables has changed
   thus allowing to remove many of the bool returns that try to indicate if the estimation has changed which would not
   be aware if the observers have changed.
 - SendSideBandwidthEstimation now has a UpdateBitrate and has clear code paths to which calls update bitrate.
 - Changes in enforce_min_bitrate so the 10kbps min is set from the BitrateController and not from the outside this keep valid as observers are changed.

R=henrik.lundin@webrtc.org, stefan@webrtc.org
BUG=3065

Review URL: https://webrtc-codereview.appspot.com/10189004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5752 4adac7df-926f-26a2-2b94-8c16560cd09d
(Auto)update libjingle 63547048-> 63560528

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5753 4adac7df-926f-26a2-2b94-8c16560cd09d