[turbofan] Rewrite ToObject as TurboFan stub.

src/full-codegen/arm/full-codegen-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/ast/scopes.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 987 matching lines @@
   __ JumpIfSmi(r0, &convert);
   __ CompareObjectType(r0, r1, r1, FIRST_JS_RECEIVER_TYPE);
   __ b(ge, &done_convert);
   __ CompareRoot(r0, Heap::kNullValueRootIndex);
   __ b(eq, &exit);
   __ CompareRoot(r0, Heap::kUndefinedValueRootIndex);
   __ b(eq, &exit);
   __ bind(&convert);
   ToObjectStub stub(isolate());
   __ CallStub(&stub);
+  RestoreContext();
   __ bind(&done_convert);
   PrepareForBailoutForId(stmt->ToObjectId(), BailoutState::TOS_REGISTER);
   __ push(r0);
 
   // Check cache validity in generated code. If we cannot guarantee cache
   // validity, call the runtime system to check cache validity or get the
   // property names in a fixed array. Note: Proxies never have an enum cache,
   // so will always take the slow path.
   Label call_runtime;
   __ CheckEnumCache(&call_runtime);
@@ skipping 2820 matching lines @@
   DCHECK(interrupt_address ==
          isolate->builtins()->OnStackReplacement()->entry());
   return ON_STACK_REPLACEMENT;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM