Fix for bug http://code.google.com/p/v8/issues/detail?id=1176.

src/arm/codegen-arm.cc

Index: src/arm/codegen-arm.cc
diff --git a/src/arm/codegen-arm.cc b/src/arm/codegen-arm.cc
index a3921d8efccb6a2bc2596f2d715aca135aa5947d..b83f33d530da71a58fe271af1aeea16e1c11947d 100644
--- a/src/arm/codegen-arm.cc
+++ b/src/arm/codegen-arm.cc
@@ -5850,8 +5850,8 @@ void CodeGenerator::VisitUnaryOperation(UnaryOperation* node) {
 
     } else if (variable != NULL) {
       // Delete of an unqualified identifier is disallowed in strict mode
-      // so this code can only be reached in non-strict mode.
-      ASSERT(strict_mode_flag() == kNonStrictMode);
+      // (but "delete this" is).
+      ASSERT(strict_mode_flag() == kNonStrictMode || variable->is_this());
       Slot* slot = variable->AsSlot();
       if (variable->is_global()) {
         LoadGlobal();