Remove dependency on Vector from platform files

src/hydrogen.h

 // 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.
 
 #ifndef V8_HYDROGEN_H_
 #define V8_HYDROGEN_H_
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
@@ skipping 2790 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(HPhase);
 };
 
 
 class HTracer V8_FINAL : public Malloced {
  public:
   explicit HTracer(int isolate_id)
       : trace_(&string_allocator_), indent_(0) {
     if (FLAG_trace_hydrogen_file == NULL) {
-      OS::SNPrintF(filename_,
-                   "hydrogen-%d-%d.cfg",
-                   OS::GetCurrentProcessId(),
-                   isolate_id);
+      SNPrintF(filename_,
+               "hydrogen-%d-%d.cfg",
+               OS::GetCurrentProcessId(),
+               isolate_id);
     } else {
-      OS::StrNCpy(filename_, FLAG_trace_hydrogen_file, filename_.length());
+      StrNCpy(filename_, FLAG_trace_hydrogen_file, filename_.length());
     }
     WriteChars(filename_.start(), "", 0, false);
   }
 
   void TraceCompilation(CompilationInfo* info);
   void TraceHydrogen(const char* name, HGraph* graph);
   void TraceLithium(const char* name, LChunk* chunk);
   void TraceLiveRanges(const char* name, LAllocator* allocator);
 
  private:
@@ skipping 73 matching lines @@
   }
 
  private:
   HGraphBuilder* builder_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_