Eliminate dependencies on assemblers and code stubs in precompiled runtime.

runtime/vm/runtime_entry_arm64.cc

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/runtime_entry.h"
 
 #include "vm/assembler.h"
@@ skipping 20 matching lines @@
       is_leaf() ? (is_float() ? Simulator::kLeafFloatRuntimeCall
                               : Simulator::kLeafRuntimeCall)
                 : Simulator::kRuntimeCall;
   entry =
       Simulator::RedirectExternalReference(entry, call_kind, argument_count());
 #endif
   return entry;
 }
 
 
+#if !defined(DART_PRECOMPILED_RUNTIME)
 // Generate code to call into the stub which will call the runtime
 // function. Input for the stub is as follows:
 //   SP : points to the arguments and return value array.
 //   R5 : address of the runtime function to call.
 //   R4 : number of arguments to the call.
 void RuntimeEntry::Call(Assembler* assembler, intptr_t argument_count) const {
   if (is_leaf()) {
     ASSERT(argument_count == this->argument_count());
     // Since we are entering C++ code, we must restore the C stack pointer from
     // the stack limit to an aligned value nearer to the top of the stack.
@@ skipping 15 matching lines @@
     __ mov(SP, R25);
     __ mov(CSP, R23);
   } else {
     // Argument count is not checked here, but in the runtime entry for a more
     // informative error message.
     __ ldr(R5, Address(THR, Thread::OffsetFromThread(this)));
     __ LoadImmediate(R4, argument_count);
     __ BranchLinkToRuntime();
   }
 }
+#endif  // !defined(DART_PRECOMPILED_RUNTIME)
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64