Fix inconsistencies wrt whitespaces.

src/runtime.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 6523 matching lines @@
       args, isolate, isolate->runtime_state()->to_lower_mapping());
 }
 
 
 RUNTIME_FUNCTION(MaybeObject*, Runtime_StringToUpperCase) {
   return ConvertCase(
       args, isolate, isolate->runtime_state()->to_upper_mapping());
 }
 
 
-static inline bool IsTrimWhiteSpace(unibrow::uchar c) {
-  return unibrow::WhiteSpace::Is(c) || c == 0x200b || c == 0xfeff;
-}
-
-
 RUNTIME_FUNCTION(MaybeObject*, Runtime_StringTrim) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 3);
 
   CONVERT_ARG_HANDLE_CHECKED(String, string, 0);
   CONVERT_BOOLEAN_ARG_CHECKED(trimLeft, 1);
   CONVERT_BOOLEAN_ARG_CHECKED(trimRight, 2);
 
   string = FlattenGetString(string);
   int length = string->length();
 
   int left = 0;
+  UnicodeCache* unicode_cache = isolate->unicode_cache();
   if (trimLeft) {
-    while (left < length && IsTrimWhiteSpace(string->Get(left))) {
+    while (left < length &&
+           unicode_cache->IsWhiteSpaceOrLineTerminator(string->Get(left))) {
       left++;
     }
   }
 
   int right = length;
   if (trimRight) {
-    while (right > left && IsTrimWhiteSpace(string->Get(right - 1))) {
+    while (right > left &&
+           unicode_cache->IsWhiteSpaceOrLineTerminator(
+               string->Get(right - 1))) {
       right--;
     }
   }
 
   return *isolate->factory()->NewSubString(string, left, right);
 }
 
 
 RUNTIME_FUNCTION(MaybeObject*, Runtime_StringSplit) {
   HandleScope handle_scope(isolate);
@@ skipping 8285 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal