Don't call EnsureInitialized in the JIT.

Calling EnsureInitialized can block due to locking on the class
object, that an application can also do.

Just rely that the compilation request is for a reason.

The compiler aleady knows how to compile methods of classes that
are not initialized.

bug: 62243120
Test: test.py --jit
Change-Id: I6cd6828b4c2179504cf5334921fcb8d46615c77b
diff --git a/compiler/jit/jit_compiler.cc b/compiler/jit/jit_compiler.cc
index fed1f48..6613541 100644
--- a/compiler/jit/jit_compiler.cc
+++ b/compiler/jit/jit_compiler.cc
@@ -189,18 +189,12 @@
 
 bool JitCompiler::CompileMethod(Thread* self, ArtMethod* method, bool osr) {
   DCHECK(!method->IsProxyMethod());
+  DCHECK(method->GetDeclaringClass()->IsResolved());
+
   TimingLogger logger("JIT compiler timing logger", true, VLOG_IS_ON(jit));
-  StackHandleScope<2> hs(self);
   self->AssertNoPendingException();
   Runtime* runtime = Runtime::Current();
 
-  // Ensure the class is initialized.
-  Handle<mirror::Class> h_class(hs.NewHandle(method->GetDeclaringClass()));
-  if (!runtime->GetClassLinker()->EnsureInitialized(self, h_class, true, true)) {
-    VLOG(jit) << "JIT failed to initialize " << method->PrettyMethod();
-    return false;
-  }
-
   // Do the compilation.
   bool success = false;
   {