Simplify CodePatcher::GetStaticCallAt.

runtime/vm/native_entry_test.cc

Index: runtime/vm/native_entry_test.cc
===================================================================
--- runtime/vm/native_entry_test.cc	(revision 15091)
+++ runtime/vm/native_entry_test.cc	(working copy)
@@ -58,20 +58,15 @@
 // Test code patching.
 void TestStaticCallPatching(Dart_NativeArguments args) {
   Dart_EnterScope();
-  Function& target_function = Function::Handle();
   DartFrameIterator iterator;
   iterator.NextFrame();  // Skip native call.
   StackFrame* static_caller_frame = iterator.NextFrame();
-  uword target_address = 0;
-  CodePatcher::GetStaticCallAt(static_caller_frame->pc(),
-                               &target_function,
-                               &target_address);
+  uword target_address =
+      CodePatcher::GetStaticCallTargetAt(static_caller_frame->pc());
   const Code& code = Code::Handle(static_caller_frame->LookupDartCode());
-  const Function& target_function_2 =
+  const Function& target_function =
       Function::Handle(code.GetStaticCallTargetFunctionAt(
           static_caller_frame->pc()));
-  EXPECT(!target_function_2.IsNull());
-  EXPECT_EQ(target_function_2.raw(), target_function.raw());
   EXPECT(String::Handle(target_function.name()).
       Equals(String::Handle(String::New("NativePatchStaticCall"))));
   const uword function_entry_address =