Rename the VM internal class ByteArray to ByteVector.

runtime/vm/debuginfo_macos.cc

Index: runtime/vm/debuginfo_macos.cc
diff --git a/runtime/vm/debuginfo_macos.cc b/runtime/vm/debuginfo_macos.cc
index 9fb941b4241abcdd44e5144b2e8b391110211530..4ead82700381325ae1f7a29e4a7cac854512f984 100644
--- a/runtime/vm/debuginfo_macos.cc
+++ b/runtime/vm/debuginfo_macos.cc
@@ -25,7 +25,7 @@ void DebugInfo::AddCodeRegion(const char* name, uword pc, intptr_t size) {
 }
 
 
-bool DebugInfo::WriteToMemory(ByteArray* region) {
+bool DebugInfo::WriteToMemory(ByteVector* region) {
   // Nothing to do as there is no support for this on macos.
   return false;
 }