Remove support for Javascript warnings in the VM.

runtime/lib/integers.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/bootstrap_natives.h"
 
 #include "include/dart_api.h"
 #include "vm/dart_entry.h"
 #include "vm/dart_api_impl.h"
 #include "vm/exceptions.h"
@@ skipping 233 matching lines @@
       if (result.IsSmi()) {
         return result.raw();
       }
       return result.CheckAndCanonicalize(NULL);
     }
   }
   return default_value.raw();
 }
 
 
-// Passing true for 'silent' prevents throwing JavascriptIntegerOverflow.
 static RawInteger* ShiftOperationHelper(Token::Kind kind,
                                         const Integer& value,
-                                        const Smi& amount,
-                                        const bool silent = false) {
+                                        const Smi& amount) {
   if (amount.Value() < 0) {
     Exceptions::ThrowArgumentError(amount);
   }
   if (value.IsSmi()) {
     const Smi& smi_value = Smi::Cast(value);
-    return smi_value.ShiftOp(kind, amount, Heap::kNew, silent);
+    return smi_value.ShiftOp(kind, amount, Heap::kNew);
   }
   if (value.IsMint()) {
     const int64_t mint_value = value.AsInt64Value();
     const int count = Utils::HighestBit(mint_value);
     intptr_t shift_count = amount.Value();
     if (kind == Token::kSHR) {
       shift_count = -shift_count;
     }
     if ((count + shift_count) < Mint::kBits) {
       switch (kind) {
         case Token::kSHL:
-          return Integer::New(mint_value << shift_count, Heap::kNew, silent);
+          return Integer::New(mint_value << shift_count, Heap::kNew);
         case Token::kSHR:
           shift_count =
               (-shift_count > Mint::kBits) ? Mint::kBits : -shift_count;
-          return Integer::New(mint_value >> shift_count, Heap::kNew, silent);
+          return Integer::New(mint_value >> shift_count, Heap::kNew);
         default:
           UNIMPLEMENTED();
       }
     } else {
       // Overflow in shift, use Bigints
       return Integer::null();
     }
   } else {
     ASSERT(value.IsBigint());
   }
   return Integer::null();
 }
 
 
 DEFINE_NATIVE_ENTRY(Integer_leftShiftWithMask32, 3) {
   const Integer& value = Integer::CheckedHandle(arguments->NativeArgAt(0));
   GET_NON_NULL_NATIVE_ARGUMENT(Integer, shift_count, arguments->NativeArgAt(1));
   GET_NON_NULL_NATIVE_ARGUMENT(Integer, mask, arguments->NativeArgAt(2));
   ASSERT(CheckInteger(value));
   ASSERT(CheckInteger(shift_count));
   ASSERT(CheckInteger(mask));
   if (!shift_count.IsSmi()) {
     // Shift count is too large..
     const Instance& exception =
         Instance::Handle(isolate->object_store()->out_of_memory());
     Exceptions::Throw(thread, exception);
   }
   const Smi& smi_shift_count = Smi::Cast(shift_count);
   const Integer& shift_result = Integer::Handle(
-      ShiftOperationHelper(Token::kSHL, value, smi_shift_count, true));
+      ShiftOperationHelper(Token::kSHL, value, smi_shift_count));
   const Integer& result =
       Integer::Handle(shift_result.BitOp(Token::kBIT_AND, mask));
   return result.AsValidInteger();
 }
 
 
 DEFINE_NATIVE_ENTRY(Smi_shrFromInt, 2) {
   const Smi& amount = Smi::CheckedHandle(arguments->NativeArgAt(0));
   GET_NON_NULL_NATIVE_ARGUMENT(Integer, value, arguments->NativeArgAt(1));
   ASSERT(CheckInteger(amount));
@@ skipping 105 matching lines @@
 DEFINE_NATIVE_ENTRY(Bigint_allocate, 4) {
   // First arg is null type arguments, since class Bigint is not parameterized.
   const Bool& neg = Bool::CheckedHandle(arguments->NativeArgAt(1));
   const Smi& used = Smi::CheckedHandle(arguments->NativeArgAt(2));
   const TypedData& digits = TypedData::CheckedHandle(arguments->NativeArgAt(3));
   ASSERT(!digits.IsNull());
   return Bigint::New(neg.value(), used.Value(), digits);
 }
 
 }  // namespace dart