Revert "Hash-based DexCache field array."

Reverting to allow rebasing the revert
    https://android-review.googlesource.com/351689
without too many conflicts.

Bug: 30627598

This reverts commit 1aea3510b8dd0c512cec61c91c5ef1f1e5d53d64.

Change-Id: I4af65e9f41c8bad8106c028947eca7c5a9534c53
diff --git a/compiler/driver/compiler_driver_test.cc b/compiler/driver/compiler_driver_test.cc
index 35aa1ee..562f97b 100644
--- a/compiler/driver/compiler_driver_test.cc
+++ b/compiler/driver/compiler_driver_test.cc
@@ -133,10 +133,9 @@
         << " " << dex.GetMethodDeclaringClassDescriptor(dex.GetMethodId(i)) << " "
         << dex.GetMethodName(dex.GetMethodId(i));
   }
-  EXPECT_TRUE(dex_cache->StaticArtFieldSize() == dex_cache->NumResolvedFields()
-      || dex.NumFieldIds() ==  dex_cache->NumResolvedFields());
+  EXPECT_EQ(dex.NumFieldIds(), dex_cache->NumResolvedFields());
   for (size_t i = 0; i < dex_cache->NumResolvedFields(); i++) {
-    ArtField* field = dex_cache->GetResolvedField(i, cl->GetImagePointerSize());
+    ArtField* field = cl->GetResolvedField(i, dex_cache);
     EXPECT_TRUE(field != nullptr) << "field_idx=" << i
                                << " " << dex.GetFieldDeclaringClassDescriptor(dex.GetFieldId(i))
                                << " " << dex.GetFieldName(dex.GetFieldId(i));