Move dex_files_for_oat_file_ to CompilerOptions.

A step toward removing the CompilerDriver dependency from
several classes, including HSharpening and ImageWriter.

Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Change-Id: I364ef66511fdf855cb11b12c818a40572b037727
diff --git a/compiler/driver/compiler_driver_test.cc b/compiler/driver/compiler_driver_test.cc
index 491e61f..2eeb439 100644
--- a/compiler/driver/compiler_driver_test.cc
+++ b/compiler/driver/compiler_driver_test.cc
@@ -46,7 +46,7 @@
     TimingLogger timings("CompilerDriverTest::CompileAll", false, false);
     TimingLogger::ScopedTiming t(__FUNCTION__, &timings);
     dex_files_ = GetDexFiles(class_loader);
-    compiler_driver_->SetDexFilesForOatFile(dex_files_);;
+    SetDexFilesForOatFile(dex_files_);
     compiler_driver_->CompileAll(class_loader, dex_files_, &timings);
     t.NewTiming("MakeAllExecutable");
     MakeAllExecutable(class_loader);
@@ -331,7 +331,7 @@
     ASSERT_GT(dex_files.size(), 0u);
     dex_file = dex_files.front();
   }
-  compiler_driver_->SetDexFilesForOatFile(dex_files);
+  SetDexFilesForOatFile(dex_files);
   callbacks_->SetDoesClassUnloading(true, compiler_driver_.get());
   ClassReference ref(dex_file, 0u);
   // Test that the status is read from the compiler driver as expected.