Add LOCAL_ prefix to non-UMA histogram macros.

chrome/browser/spellchecker/spellcheck_platform_mac.mm

Index: chrome/browser/spellchecker/spellcheck_platform_mac.mm
diff --git a/chrome/browser/spellchecker/spellcheck_platform_mac.mm b/chrome/browser/spellchecker/spellcheck_platform_mac.mm
index a5951ed5169ec6b6315b76346147259bd0b7bb4e..5eee7b058a79d4dab0b545de6f66f0121cfd3b4b 100644
--- a/chrome/browser/spellchecker/spellcheck_platform_mac.mm
+++ b/chrome/browser/spellchecker/spellcheck_platform_mac.mm
@@ -197,11 +197,15 @@ bool CheckSpelling(const base::string16& word_to_check, int tag) {
 void FillSuggestionList(const base::string16& wrong_word,
                         std::vector<base::string16>* optional_suggestions) {
   NSString* NS_wrong_word = base::SysUTF16ToNSString(wrong_word);
-  TimeTicks debug_begin_time = base::Histogram::DebugNow();
+#ifndef NDEBUG
+  TimeTicks debug_begin_time = base::TimeTicks::Now();
+#endif
   // The suggested words for |wrong_word|.
   NSArray* guesses = [SharedSpellChecker() guessesForWord:NS_wrong_word];
-  DHISTOGRAM_TIMES("Spellcheck.SuggestTime",
-                   base::Histogram::DebugNow() - debug_begin_time);
+#ifndef NDEBUG
+  LOCAL_HISTOGRAM_TIMES("Spellcheck.SuggestTime",

[groby-ooo-7-16, 2014/08/25 21:12:11]

Feel free to remove

[Alexei Svitkine (slow), 2014/08/25 21:21:03]

Done.

+                        base::TimeTicks::Now() - debug_begin_time);
+#endif
 
   for (int i = 0; i < static_cast<int>([guesses count]); ++i) {
     if (i < chrome::spellcheck_common::kMaxSuggestions) {