Fix occurrences of const typed declaration without initialization

This fixes compilation errors as the following:

error: constructor must explicitly initialize the const member

BUG=506663
R=aluebs@webrtc.org, tommi@webrtc.org

Signed-off-by: Eduardo Lima (Etrunko) <eduardo.lima@intel.com>

Review URL: https://codereview.webrtc.org/1222233002

Cr-Commit-Position: refs/heads/master@{#9538}
diff --git a/webrtc/modules/audio_processing/include/audio_processing.h b/webrtc/modules/audio_processing/include/audio_processing.h
index 37699b7..9affbdd 100644
--- a/webrtc/modules/audio_processing/include/audio_processing.h
+++ b/webrtc/modules/audio_processing/include/audio_processing.h
@@ -103,7 +103,9 @@
 // Use to enable beamforming. Must be provided through the constructor. It will
 // have no impact if used with AudioProcessing::SetExtraOptions().
 struct Beamforming {
-  Beamforming() : enabled(false) {}
+  Beamforming()
+      : enabled(false),
+        array_geometry() {}
   Beamforming(bool enabled, const std::vector<Point>& array_geometry)
       : enabled(enabled),
         array_geometry(array_geometry) {}
diff --git a/webrtc/p2p/client/basicportallocator.cc b/webrtc/p2p/client/basicportallocator.cc
index 41edd85..bdafe35 100644
--- a/webrtc/p2p/client/basicportallocator.cc
+++ b/webrtc/p2p/client/basicportallocator.cc
@@ -152,7 +152,8 @@
     rtc::NetworkManager* network_manager,
     rtc::PacketSocketFactory* socket_factory)
     : network_manager_(network_manager),
-      socket_factory_(socket_factory) {
+      socket_factory_(socket_factory),
+      stun_servers_() {
   ASSERT(socket_factory_ != NULL);
   Construct();
 }
@@ -160,7 +161,8 @@
 BasicPortAllocator::BasicPortAllocator(
     rtc::NetworkManager* network_manager)
     : network_manager_(network_manager),
-      socket_factory_(NULL) {
+      socket_factory_(NULL),
+      stun_servers_() {
   Construct();
 }