Eliminate dependencies on assemblers and code stubs in precompiled runtime.

runtime/vm/stub_code_x64.cc

Index: runtime/vm/stub_code_x64.cc
diff --git a/runtime/vm/stub_code_x64.cc b/runtime/vm/stub_code_x64.cc
index 95874ca8b111a54cd24448d77a231aea04b7faa4..087d31c83ee1f12723c741ca9f6a59b560c16fc5 100644
--- a/runtime/vm/stub_code_x64.cc
+++ b/runtime/vm/stub_code_x64.cc
@@ -3,7 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
-#if defined(TARGET_ARCH_X64)
+#if defined(TARGET_ARCH_X64) && !defined(DART_PRECOMPILED_RUNTIME)
 
 #include "vm/assembler.h"
 #include "vm/compiler.h"
@@ -97,13 +97,6 @@ void StubCode::GenerateCallToRuntimeStub(Assembler* assembler) {
 }
 
 
-// Print the stop message.
-DEFINE_LEAF_RUNTIME_ENTRY(void, PrintStopMessage, 1, const char* message) {
-  OS::Print("Stop message: %s\n", message);
-}
-END_LEAF_RUNTIME_ENTRY
-
-
 // Input parameters:
 //   RSP : points to return address.
 //   RDI : stop message (const char*).
@@ -2329,4 +2322,4 @@ void StubCode::GenerateAsynchronousGapMarkerStub(Assembler* assembler) {
 
 }  // namespace dart
 
-#endif  // defined TARGET_ARCH_X64
+#endif  // defined(TARGET_ARCH_X64) && !defined(DART_PRECOMPILED_RUNTIME)