Fix style violations in common_types.h and config.h

Mostly, it's about moving constructors and descructors to the .cc
files, so that they won't be inlined everywhere.

The reason this CL is so big is that a lot of code was using
common_types.h without declaring a dependency on webrtc_common, which
broke the build once common_types.h started to depend on
common_types.cc.

BUG=163
R=kjellander@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/26089004

Cr-Commit-Position: refs/heads/master@{#8516}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8516 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/config.h b/webrtc/config.h
index 9f2a7a3..1777937 100644
--- a/webrtc/config.h
+++ b/webrtc/config.h
@@ -56,14 +56,8 @@
 };
 
 struct VideoStream {
-  VideoStream()
-      : width(0),
-        height(0),
-        max_framerate(-1),
-        min_bitrate_bps(-1),
-        target_bitrate_bps(-1),
-        max_bitrate_bps(-1),
-        max_qp(-1) {}
+  VideoStream();
+  ~VideoStream();
   std::string ToString() const;
 
   size_t width;
@@ -95,11 +89,8 @@
     kScreenshare,
   };
 
-  VideoEncoderConfig()
-      : content_type(kRealtimeVideo),
-        encoder_specific_settings(NULL),
-        min_transmit_bitrate_bps(0) {}
-
+  VideoEncoderConfig();
+  ~VideoEncoderConfig();
   std::string ToString() const;
 
   std::vector<VideoStream> streams;