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

src/arm/full-codegen-arm.cc

Index: src/arm/full-codegen-arm.cc
diff --git a/src/arm/full-codegen-arm.cc b/src/arm/full-codegen-arm.cc
index 9b589e61c3dc12cb445f5adcc6b09c5512722f6d..9d57076affc7de8e7d31fd85be7a97774b0946e5 100644
--- a/src/arm/full-codegen-arm.cc
+++ b/src/arm/full-codegen-arm.cc
@@ -3373,8 +3373,8 @@ void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
         }
       } else if (var != 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 || var->is_this());
         if (var->is_global()) {
           __ ldr(r2, GlobalObjectOperand());
           __ mov(r1, Operand(var->name()));