Clean up CodeItemAccessors and Compact/StandardDexFile

Change constructor to use a reference to a dex file.

Remove duplicated logic for GetCodeItemSize.

Bug: 63756964
Test: test-art-host
Change-Id: I69af8b93abdf6bdfa4454e16db8f4e75883bca46
diff --git a/compiler/optimizing/code_generator.cc b/compiler/optimizing/code_generator.cc
index 07894fd..01155dc 100644
--- a/compiler/optimizing/code_generator.cc
+++ b/compiler/optimizing/code_generator.cc
@@ -911,7 +911,7 @@
   }
   ArenaVector<size_t> covered(
       loop_headers.size(), 0, graph.GetAllocator()->Adapter(kArenaAllocMisc));
-  for (const DexInstructionPcPair& pair : CodeItemInstructionAccessor(&graph.GetDexFile(),
+  for (const DexInstructionPcPair& pair : CodeItemInstructionAccessor(graph.GetDexFile(),
                                                                       &code_item)) {
     const uint32_t dex_pc = pair.DexPc();
     const Instruction& instruction = pair.Inst();
diff --git a/compiler/optimizing/inliner.cc b/compiler/optimizing/inliner.cc
index 7a66d80..b2ad8ec 100644
--- a/compiler/optimizing/inliner.cc
+++ b/compiler/optimizing/inliner.cc
@@ -1660,7 +1660,7 @@
   const DexFile::CodeItem* code_item = resolved_method->GetCodeItem();
   const DexFile& callee_dex_file = *resolved_method->GetDexFile();
   uint32_t method_index = resolved_method->GetDexMethodIndex();
-  CodeItemDebugInfoAccessor code_item_accessor(&callee_dex_file, code_item);
+  CodeItemDebugInfoAccessor code_item_accessor(callee_dex_file, code_item);
   ClassLinker* class_linker = caller_compilation_unit_.GetClassLinker();
   Handle<mirror::DexCache> dex_cache = NewHandleIfDifferent(resolved_method->GetDexCache(),
                                                             caller_compilation_unit_.GetDexCache(),
@@ -1968,7 +1968,7 @@
     return;
   }
 
-  CodeItemDataAccessor accessor(&callee_graph->GetDexFile(), code_item);
+  CodeItemDataAccessor accessor(callee_graph->GetDexFile(), code_item);
   HInliner inliner(callee_graph,
                    outermost_graph_,
                    codegen_,
diff --git a/compiler/optimizing/optimization.cc b/compiler/optimizing/optimization.cc
index 92b427c..57db7a6 100644
--- a/compiler/optimizing/optimization.cc
+++ b/compiler/optimizing/optimization.cc
@@ -242,7 +242,7 @@
         opt = new (allocator) HDeadCodeElimination(graph, stats, name);
         break;
       case OptimizationPass::kInliner: {
-        CodeItemDataAccessor accessor(dex_compilation_unit.GetDexFile(),
+        CodeItemDataAccessor accessor(*dex_compilation_unit.GetDexFile(),
                                       dex_compilation_unit.GetCodeItem());
         opt = new (allocator) HInliner(graph,                   // outer_graph
                                        graph,                   // outermost_graph
diff --git a/compiler/optimizing/optimizing_compiler.cc b/compiler/optimizing/optimizing_compiler.cc
index b64f82c..f4115f7 100644
--- a/compiler/optimizing/optimizing_compiler.cc
+++ b/compiler/optimizing/optimizing_compiler.cc
@@ -766,13 +766,13 @@
   static constexpr size_t kSpaceFilterOptimizingThreshold = 128;
   const CompilerOptions& compiler_options = compiler_driver->GetCompilerOptions();
   if ((compiler_options.GetCompilerFilter() == CompilerFilter::kSpace)
-      && (CodeItemInstructionAccessor(&dex_file, code_item).InsnsSizeInCodeUnits() >
+      && (CodeItemInstructionAccessor(dex_file, code_item).InsnsSizeInCodeUnits() >
           kSpaceFilterOptimizingThreshold)) {
     MaybeRecordStat(compilation_stats_.get(), MethodCompilationStat::kNotCompiledSpaceFilter);
     return nullptr;
   }
 
-  CodeItemDebugInfoAccessor code_item_accessor(&dex_file, code_item);
+  CodeItemDebugInfoAccessor code_item_accessor(dex_file, code_item);
   HGraph* graph = new (allocator) HGraph(
       allocator,
       arena_stack,
diff --git a/compiler/optimizing/optimizing_unit_test.h b/compiler/optimizing/optimizing_unit_test.h
index 661abb1..8c97d57 100644
--- a/compiler/optimizing/optimizing_unit_test.h
+++ b/compiler/optimizing/optimizing_unit_test.h
@@ -146,7 +146,7 @@
               /* access_flags */ 0u,
               /* verified_method */ nullptr,
               handles_->NewHandle<mirror::DexCache>(nullptr));
-      CodeItemDebugInfoAccessor accessor(&graph->GetDexFile(), code_item);
+      CodeItemDebugInfoAccessor accessor(graph->GetDexFile(), code_item);
       HGraphBuilder builder(graph, dex_compilation_unit, accessor, handles_.get(), return_type);
       bool graph_built = (builder.BuildGraph() == kAnalysisSuccess);
       return graph_built ? graph : nullptr;