Replace OStream with std::ostream.

src/frames.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "src/frames.h"
+
+#include <sstream>
+
 #include "src/v8.h"
 
 #include "src/ast.h"
 #include "src/base/bits.h"
 #include "src/deoptimizer.h"
 #include "src/frames-inl.h"
 #include "src/full-codegen.h"
 #include "src/heap/mark-compact.h"
 #include "src/safepoint-table.h"
 #include "src/scopeinfo.h"
@@ skipping 1266 matching lines @@
   if (expressions_start < expressions_count) {
     accumulator->Add("  // expression stack (top to bottom)\n");
   }
   for (int i = expressions_count - 1; i >= expressions_start; i--) {
     if (IsExpressionInsideHandler(i)) continue;
     accumulator->Add("  [%02d] : %o\n", i, GetExpression(i));
   }
 
   // Print details about the function.
   if (FLAG_max_stack_trace_source_length != 0 && code != NULL) {
-    OStringStream os;
+    std::ostringstream os;
     SharedFunctionInfo* shared = function->shared();
     os << "--------- s o u r c e   c o d e ---------\n"
        << SourceCodeOf(shared, FLAG_max_stack_trace_source_length)
        << "\n-----------------------------------------\n";
-    accumulator->Add(os.c_str());
+    accumulator->Add(os.str().c_str());
   }
 
   accumulator->Add("}\n\n");
 }
 
 
 void ArgumentsAdaptorFrame::Print(StringStream* accumulator,
                                   PrintMode mode,
                                   int index) const {
   int actual = ComputeParametersCount();
@@ skipping 328 matching lines @@
   ZoneList<StackFrame*> list(10, zone);
   for (StackFrameIterator it(isolate); !it.done(); it.Advance()) {
     StackFrame* frame = AllocateFrameCopy(it.frame(), zone);
     list.Add(frame, zone);
   }
   return list.ToVector();
 }
 
 
 } }  // namespace v8::internal