Replace kInvalidThroughput with INVALID_RTT_THROUGHPUT.

As the comment in network_quality.h by tbansal@,
replace kInvalidThroughput with INVALID_RTT_THROUGHPUT.

BUG=
[email protected]

Cq-Include-Trybots: master.tryserver.chromium.android:android_cronet_tester;master.tryserver.chromium.mac:ios-simulator-cronet

Signed-off-by: zhuoyu.qian <[email protected]>
Change-Id: I148b149e6787b79a8e7ffda4f7446854d63662bf
Reviewed-on: https://chromium-review.googlesource.com/734926
Commit-Queue: Daniel Cheng <[email protected]>
Reviewed-by: Daniel Cheng <[email protected]>
Reviewed-by: Tarun Bansal <[email protected]>
Cr-Commit-Position: refs/heads/master@{#512464}
diff --git a/content/common/renderer.mojom b/content/common/renderer.mojom
index 8749a02..ad8c015e5 100644
--- a/content/common/renderer.mojom
+++ b/content/common/renderer.mojom
@@ -200,7 +200,7 @@
   // The downstream throughput is computed in kilobits per second. If an
   // estimate of the HTTP or transport RTT is unavailable, it will be set to
   // net::nqe::internal::InvalidRTT(). If the throughput estimate is
-  // unavailable, it will be set to net::nqe::internal::kInvalidThroughput.
+  // unavailable, it will be set to net::nqe::internal::INVALID_RTT_THROUGHPUT.
   OnNetworkQualityChanged(EffectiveConnectionType effective_connection_type,
                           mojo.common.mojom.TimeDelta http_rtt,
                           mojo.common.mojom.TimeDelta transport_rtt,