Remove MethodHelper from the interpreter.

Use ShadowFrame to get the executing method to avoid a handle for the current
method.
Various associated bits of header file clean-up and removal of an unnecessary
use of MethodHelper in CompilerDriver.

Change-Id: I3b6f4413701e8fc6b0c58b0041a0dd15472bedaa
diff --git a/runtime/interpreter/interpreter.h b/runtime/interpreter/interpreter.h
index d327a71..7d634b3 100644
--- a/runtime/interpreter/interpreter.h
+++ b/runtime/interpreter/interpreter.h
@@ -27,7 +27,6 @@
 }  // namespace mirror
 
 union JValue;
-class MethodHelper;
 class ShadowFrame;
 class Thread;
 
@@ -42,21 +41,18 @@
                                            JValue* ret_val)
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
-extern JValue EnterInterpreterFromEntryPoint(Thread* self, MethodHelper* mh,
-                                             const DexFile::CodeItem* code_item,
+extern JValue EnterInterpreterFromEntryPoint(Thread* self, const DexFile::CodeItem* code_item,
                                              ShadowFrame* shadow_frame)
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
 
 }  // namespace interpreter
 
-extern "C" void artInterpreterToInterpreterBridge(Thread* self, MethodHelper* mh,
-                                                  const DexFile::CodeItem* code_item,
+extern "C" void artInterpreterToInterpreterBridge(Thread* self, const DexFile::CodeItem* code_item,
                                                   ShadowFrame* shadow_frame, JValue* result)
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
-extern "C" void artInterpreterToCompiledCodeBridge(Thread* self, MethodHelper* mh,
-                                                   const DexFile::CodeItem* code_item,
+extern "C" void artInterpreterToCompiledCodeBridge(Thread* self, const DexFile::CodeItem* code_item,
                                                    ShadowFrame* shadow_frame, JValue* result)
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);