In QUIC simulator:
1) Allow the bandwidth of OneWayLink/SymmetricLink to change after construction.
2) Change QuicEndpointMultiplexer's constructor from taking a std::initializer_list to a std::vector.

gfe-relnote: (n/a) Test utility refactor.
PiperOrigin-RevId: 252722327
Change-Id: Id2eb88ab5a8436480dce40ca6188393ba5d0f4e9

quic/test_tools/simulator/link.h

diff --git a/quic/test_tools/simulator/link.h b/quic/test_tools/simulator/link.h
index 531eff6..5621e1b 100644
--- a/quic/test_tools/simulator/link.h
+++ b/quic/test_tools/simulator/link.h
@@ -8,6 +8,7 @@
 #include <utility>
 
 #include "net/third_party/quiche/src/quic/core/crypto/quic_random.h"
+#include "net/third_party/quiche/src/quic/core/quic_bandwidth.h"
 #include "net/third_party/quiche/src/quic/test_tools/simulator/actor.h"
 #include "net/third_party/quiche/src/quic/test_tools/simulator/port.h"
 
@@ -33,6 +34,9 @@
   void Act() override;
 
   inline QuicBandwidth bandwidth() const { return bandwidth_; }
+  inline void set_bandwidth(QuicBandwidth new_bandwidth) {
+    bandwidth_ = new_bandwidth;
+  }
 
  protected:
   // Get the value of a random delay imposed on each packet.  By default, this
@@ -58,7 +62,7 @@
   UnconstrainedPortInterface* sink_;
   QuicDeque<QueuedPacket> packets_in_transit_;
 
-  const QuicBandwidth bandwidth_;
+  QuicBandwidth bandwidth_;
   const QuicTime::Delta propagation_delay_;
 
   QuicTime next_write_at_;
@@ -82,6 +86,10 @@
   SymmetricLink& operator=(const SymmetricLink&) = delete;
 
   inline QuicBandwidth bandwidth() { return a_to_b_link_.bandwidth(); }
+  inline void set_bandwidth(QuicBandwidth new_bandwidth) {
+    a_to_b_link_.set_bandwidth(new_bandwidth);
+    b_to_a_link_.set_bandwidth(new_bandwidth);
+  }
 
  private:
   OneWayLink a_to_b_link_;

quic/test_tools/simulator/quic_endpoint.cc

diff --git a/quic/test_tools/simulator/quic_endpoint.cc b/quic/test_tools/simulator/quic_endpoint.cc
index 78cc302..ba9d206 100644
--- a/quic/test_tools/simulator/quic_endpoint.cc
+++ b/quic/test_tools/simulator/quic_endpoint.cc
@@ -401,7 +401,7 @@
 
 QuicEndpointMultiplexer::QuicEndpointMultiplexer(
     std::string name,
-    std::initializer_list<QuicEndpoint*> endpoints)
+    const std::vector<QuicEndpoint*>& endpoints)
     : Endpoint((*endpoints.begin())->simulator(), name) {
   for (QuicEndpoint* endpoint : endpoints) {
     mapping_.insert(std::make_pair(endpoint->name(), endpoint));

quic/test_tools/simulator/quic_endpoint.h

diff --git a/quic/test_tools/simulator/quic_endpoint.h b/quic/test_tools/simulator/quic_endpoint.h
index 8efef0e..53bff3a 100644
--- a/quic/test_tools/simulator/quic_endpoint.h
+++ b/quic/test_tools/simulator/quic_endpoint.h
@@ -213,7 +213,7 @@
                                 public UnconstrainedPortInterface {
  public:
   QuicEndpointMultiplexer(std::string name,
-                          std::initializer_list<QuicEndpoint*> endpoints);
+                          const std::vector<QuicEndpoint*>& endpoints);
   ~QuicEndpointMultiplexer() override;
 
   // Receives a packet and passes it to the specified endpoint if that endpoint