Fix Windows build

TBR=jkummerow

Review URL: https://codereview.appspot.com/7790043

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13937 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/cctest/test-heap-profiler.cc

@@ -1762,10 +1762,10 @@ TEST(ManyLocalsInSharedContext) {
   // Check all the objects have got their names.
   // ... well check just every 8th because otherwise it's too slow in debug.
   for (int i = 0; i < num_objects - 1; i += 8) {
-    char var_name[100];
-    snprintf(var_name, sizeof(var_name), "f_%d", i);
+    i::EmbeddedVector<char, 100> var_name;
+    i::OS::SNPrintF(var_name, "f_%d", i);
     const v8::HeapGraphNode* f_object = GetProperty(
-        context_object, v8::HeapGraphEdge::kContextVariable, var_name);
+        context_object, v8::HeapGraphEdge::kContextVariable, var_name.start());
     CHECK_NE(NULL, f_object);
   }
 }