Remove strong mode support from count operations.

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

Index: src/full-codegen/arm/full-codegen-arm.cc
diff --git a/src/full-codegen/arm/full-codegen-arm.cc b/src/full-codegen/arm/full-codegen-arm.cc
index 804d060217124bbe9ab11a1e4a2c139999a90321..960c7ccf2967898012bc2b42207e644fa1b93c3b 100644
--- a/src/full-codegen/arm/full-codegen-arm.cc
+++ b/src/full-codegen/arm/full-codegen-arm.cc
@@ -3703,11 +3703,11 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
     __ jmp(&stub_call);
     __ bind(&slow);
   }
-  if (!is_strong(language_mode())) {
-    ToNumberStub convert_stub(isolate());
-    __ CallStub(&convert_stub);
-    PrepareForBailoutForId(expr->ToNumberId(), TOS_REG);
-  }
+
+  // Convert old value into a number.
+  ToNumberStub convert_stub(isolate());
+  __ CallStub(&convert_stub);
+  PrepareForBailoutForId(expr->ToNumberId(), TOS_REG);
 
   // Save result for postfix expressions.
   if (expr->is_postfix()) {
@@ -3747,9 +3747,6 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
   patch_site.EmitPatchInfo();
   __ bind(&done);
 
-  if (is_strong(language_mode())) {
-    PrepareForBailoutForId(expr->ToNumberId(), TOS_REG);
-  }
   // Store the value returned in r0.
   switch (assign_type) {
     case VARIABLE: