Eliminate dependencies on assemblers and code stubs in precompiled runtime.

runtime/vm/runtime_entry_ia32.cc

Index: runtime/vm/runtime_entry_ia32.cc
diff --git a/runtime/vm/runtime_entry_ia32.cc b/runtime/vm/runtime_entry_ia32.cc
index fdb24640ecdcd03247f8961f73de64a7add945b2..5788353db09c7b5cbc819e4660187027b8f3c872 100644
--- a/runtime/vm/runtime_entry_ia32.cc
+++ b/runtime/vm/runtime_entry_ia32.cc
@@ -20,6 +20,7 @@ uword RuntimeEntry::GetEntryPoint() const {
 }
 
 
+#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:
 // For regular runtime calls -
@@ -41,6 +42,7 @@ void RuntimeEntry::Call(Assembler* assembler, intptr_t argument_count) const {
     __ CallToRuntime();
   }
 }
+#endif  // !defined(DART_PRECOMPILED_RUNTIME)
 
 }  // namespace dart