Revert "ART: Refactor SsaBuilder for more precise typing info"

This reverts commit d9510dfc32349eeb4f2145c801f7ba1d5bccfb12.

Bug: 26208284

Bug: 24252151
Bug: 24252100
Bug: 22538329
Bug: 25786318

Change-Id: I5f491becdf076ff51d437d490405ec4e1586c010
diff --git a/compiler/optimizing/constant_folding_test.cc b/compiler/optimizing/constant_folding_test.cc
index a8f65bf..e469c8d 100644
--- a/compiler/optimizing/constant_folding_test.cc
+++ b/compiler/optimizing/constant_folding_test.cc
@@ -32,7 +32,7 @@
 /**
  * Fixture class for the constant folding and dce tests.
  */
-class ConstantFoldingTest : public CommonCompilerTest {
+class ConstantFoldingTest : public testing::Test {
  public:
   ConstantFoldingTest() : pool_(), allocator_(&pool_) {
     graph_ = CreateGraph(&allocator_);
@@ -56,7 +56,7 @@
                             const std::string& expected_after_dce,
                             std::function<void(HGraph*)> check_after_cf) {
     ASSERT_NE(graph_, nullptr);
-    TransformToSsa(graph_);
+    graph_->TryBuildingSsa();
 
     StringPrettyPrinter printer_before(graph_);
     printer_before.VisitInsertionOrder();