Replace std::set with vector for signal receivers.

src/libANGLE/signal_utils.cpp

@@ -9,6 +9,8 @@
 
 #include "libANGLE/signal_utils.h"
 
+#include <algorithm>
+
 #include "common/debug.h"
 
 namespace angle
@@ -25,14 +27,15 @@ BroadcastChannel::~BroadcastChannel()
 
 void BroadcastChannel::addReceiver(ChannelBinding *receiver)
 {
-    ASSERT(mReceivers.count(receiver) == 0);
-    mReceivers.insert(receiver);
+    ASSERT(std::find(mReceivers.begin(), mReceivers.end(), receiver) == mReceivers.end());
+    mReceivers.push_back(receiver);
 }
 
 void BroadcastChannel::removeReceiver(ChannelBinding *receiver)
 {
-    ASSERT(mReceivers.count(receiver) == 1);
-    mReceivers.erase(receiver);
+    auto iter = std::find(mReceivers.begin(), mReceivers.end(), receiver);
+    ASSERT(iter != mReceivers.end());
+    mReceivers.erase(iter);
 }
 
 void BroadcastChannel::signal() const

src/libANGLE/signal_utils.h

@@ -46,7 +46,7 @@ class BroadcastChannel final : NonCopyable
     void addReceiver(ChannelBinding *receiver);
     void removeReceiver(ChannelBinding *receiver);
 
-    std::set<ChannelBinding *> mReceivers;
+    std::vector<ChannelBinding *> mReceivers;
 };
 
 // The dependent class keeps bindings to the host's BroadcastChannel.