Clean up comments for ProxyConfigClientRequest and ProxyResolvingSocketPtr

This CL cleans up comments for ProxyConfigClientRequest and
ProxyResolvingSocketPtr which are old Mojo types.

NOTRY=true

Bug: 955171
Change-Id: Ia5f22ae4a02b9418ef84f96037bad3612d960de9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1945952Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
Commit-Queue: Dave Tapuska <dtapuska@chromium.org>
Cr-Commit-Position: refs/heads/master@{#720472}

services/network/network_context_unittest.cc

@@ -2327,7 +2327,7 @@ TEST_F(NetworkContextTest, ProxyConfig) {
   }
 }
 
-// Verify that a proxy config works without a ProxyConfigClientRequest.
+// Verify that a proxy config works without a ProxyConfigClient PendingReceiver.
 TEST_F(NetworkContextTest, StaticProxyConfig) {
   net::ProxyConfig proxy_config;
   proxy_config.proxy_rules().ParseFromString("http=foopy:80;ftp=foopy2");

services/network/proxy_resolving_socket_mojo_unittest.cc

@@ -386,7 +386,7 @@ TEST_F(ProxyResolvingSocketMojoTest, ConnectWithFakeTLSHandshake) {
   EXPECT_TRUE(data_provider.AllWriteDataConsumed());
 }
 
-// Tests that when ProxyResolvingSocketPtr is destroyed but not the
+// Tests that when ProxyResolvingSocket remote is destroyed but not the
 // ProxyResolvingSocketFactory, the connect callback is not dropped.
 // Regression test for https://crbug.com/862608.
 TEST_F(ProxyResolvingSocketMojoTest, SocketDestroyedBeforeConnectCompletes) {