Clean-up sharpening and compiler driver.

Remove dependency on compiler driver for sharpening
and dex2dex (the methods called on the compiler driver were
doing unnecessary work), and remove the now unused methods
in compiler driver.

Also remove test that is now invalid, as sharpening always
succeeds.

test: m test-art-host m test-art-target
Change-Id: I54e91c6839bd5b0b86182f2f43ba5d2c112ef908
diff --git a/compiler/optimizing/code_generator_mips.cc b/compiler/optimizing/code_generator_mips.cc
index 2211ea3..f560207 100644
--- a/compiler/optimizing/code_generator_mips.cc
+++ b/compiler/optimizing/code_generator_mips.cc
@@ -4327,7 +4327,7 @@
 
 HInvokeStaticOrDirect::DispatchInfo CodeGeneratorMIPS::GetSupportedInvokeStaticOrDirectDispatch(
       const HInvokeStaticOrDirect::DispatchInfo& desired_dispatch_info,
-      MethodReference target_method ATTRIBUTE_UNUSED) {
+      HInvokeStaticOrDirect* invoke ATTRIBUTE_UNUSED) {
   HInvokeStaticOrDirect::DispatchInfo dispatch_info = desired_dispatch_info;
   // We disable PC-relative load when there is an irreducible loop, as the optimization
   // is incompatible with it.