Make context register implicit for CallInterfaceDescriptors

src/arm64/code-stubs-arm64.cc

Index: src/arm64/code-stubs-arm64.cc
diff --git a/src/arm64/code-stubs-arm64.cc b/src/arm64/code-stubs-arm64.cc
index 676079153f37ef56ae6b3473905056acb638e4ed..2d2328c1b5a20121d7a329f2a4a70ad41fc2efa4 100644
--- a/src/arm64/code-stubs-arm64.cc
+++ b/src/arm64/code-stubs-arm64.cc
@@ -102,17 +102,17 @@ void HydrogenCodeStub::GenerateLightweightMiss(MacroAssembler* masm,
   isolate()->counters()->code_stubs()->Increment();
 
   CallInterfaceDescriptor descriptor = GetCallInterfaceDescriptor();
-  int param_count = descriptor.GetEnvironmentParameterCount();
+  int param_count = descriptor.GetRegisterParameterCount();
   {
     // Call the runtime system in a fresh internal frame.
     FrameScope scope(masm, StackFrame::INTERNAL);
     DCHECK((param_count == 0) ||
-           x0.Is(descriptor.GetEnvironmentParameterRegister(param_count - 1)));
+           x0.Is(descriptor.GetRegisterParameter(param_count - 1)));
 
     // Push arguments
     MacroAssembler::PushPopQueue queue(masm);
     for (int i = 0; i < param_count; ++i) {
-      queue.Queue(descriptor.GetEnvironmentParameterRegister(i));
+      queue.Queue(descriptor.GetRegisterParameter(i));
     }
     queue.PushQueued();