Remove the barely used macro assemblers after merging their contents to the base

runtime/vm/flow_graph_compiler_arm.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_ARM.
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "lib/error.h"
@@ skipping 198 matching lines @@
       __ CompareImmediate(R7, FLAG_optimization_counter_threshold);
       ASSERT(function_reg == R6);
       __ Branch(&StubCode::OptimizeFunctionLabel(), GE);
     }
   } else {
     AddCurrentDescriptor(PcDescriptors::kEntryPatch,
                          Isolate::kNoDeoptId,
                          0);  // No token position.
   }
   __ Comment("Enter frame");
-  AssemblerMacros::EnterDartFrame(assembler(), (StackSize() * kWordSize));
+  __ EnterDartFrame((StackSize() * kWordSize));
 }
 
 
 void FlowGraphCompiler::CompileGraph() {
   InitCompiler();
   if (TryIntrinsify()) {
     // Although this intrinsified code will never be patched, it must satisfy
     // CodePatcher::CodeIsPatchable, which verifies that this code has a minimum
     // code size.
     __ bkpt(0);
@@ skipping 69 matching lines @@
         // SP + 16 + 4*(n-1) : first argument (arg 0).
         // R5 : ic-data.
         // R4 : arguments descriptor array.
         __ BranchLink(&StubCode::CallNoSuchMethodFunctionLabel());
         if (is_optimizing()) {
           stackmap_table_builder_->AddEntry(assembler()->CodeSize(),
                                             empty_stack_bitmap,
                                             0);  // No registers.
         }
         // The noSuchMethod call may return.
-        AssemblerMacros::LeaveDartFrame(assembler());
+        __ LeaveDartFrame();
         __ Ret();
       } else {
         __ Stop("Wrong number of arguments");
       }
       __ Bind(&correct_num_arguments);
     }
     // The arguments descriptor is never saved in the absence of optional
     // parameters, since any argument definition test would always yield true.
     ASSERT(saved_args_desc_var == NULL);
   } else {
@@ skipping 297 matching lines @@
 
 
 void ParallelMoveResolver::Exchange(const Address& mem1, const Address& mem2) {
   UNIMPLEMENTED();
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM