Removing warning suppression flags from pc/.

Bug: webrtc:9251
Change-Id: Ic12126fc03309448fe71a17e6b65343949496f4f
Reviewed-on: https://webrtc-review.googlesource.com/86820
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23838}
diff --git a/pc/peerconnectioninterface_unittest.cc b/pc/peerconnectioninterface_unittest.cc
index a974316..9b4a9e7 100644
--- a/pc/peerconnectioninterface_unittest.cc
+++ b/pc/peerconnectioninterface_unittest.cc
@@ -3408,13 +3408,13 @@
 
   // Grab the ufrags.
   std::vector<std::string> initial_ufrags = GetUfrags(pc_->local_description());
-  ASSERT_EQ(2, initial_ufrags.size());
+  ASSERT_EQ(2U, initial_ufrags.size());
 
   // Create offer and grab the new ufrags.
   CreateOfferAsLocalDescription();
   std::vector<std::string> subsequent_ufrags =
       GetUfrags(pc_->local_description());
-  ASSERT_EQ(2, subsequent_ufrags.size());
+  ASSERT_EQ(2U, subsequent_ufrags.size());
 
   // Ensure that only the ufrag for the second m= section changed.
   EXPECT_EQ(initial_ufrags[0], subsequent_ufrags[0]);