Memory save on some OmniBox histograms.

chrome/browser/prerender/prerender_histograms.cc

Index: chrome/browser/prerender/prerender_histograms.cc
diff --git a/chrome/browser/prerender/prerender_histograms.cc b/chrome/browser/prerender/prerender_histograms.cc
index 415b19bace613c8fb5ddd23a73e1a7e592a1af80..a79c63741b3999fb2ff859ef30221b3f6ad69300 100644
--- a/chrome/browser/prerender/prerender_histograms.cc
+++ b/chrome/browser/prerender/prerender_histograms.cc
@@ -150,19 +150,17 @@ void PrerenderHistograms::RecordPrerender(Origin origin, const GURL& url) {
 
 void PrerenderHistograms::RecordPrerenderStarted(Origin origin) const {
   if (OriginIsOmnibox(origin)) {
-    UMA_HISTOGRAM_COUNTS(
+    UMA_HISTOGRAM_ENUMERATION(

[dominich, 2012/07/23 19:39:47]

I would prefer any of these:

- calling UMA_HISTOGRAM_CUSTOM_COUNTS
- histograms being dynamically sized based on samples
- introducing UMA_HISTOGRAM_SMALL_COUNTS

but given those options, ENUMERATION is fine I guess.

         StringPrintf("Prerender.OmniboxPrerenderCount%s",
-                     PrerenderManager::GetModeString()).c_str(),
-        1);
+                     PrerenderManager::GetModeString()), 1, 2);
   }
 }
 
 void PrerenderHistograms::RecordUsedPrerender(Origin origin) const {
   if (OriginIsOmnibox(origin)) {
-    UMA_HISTOGRAM_COUNTS(
+    UMA_HISTOGRAM_ENUMERATION(
         StringPrintf("Prerender.OmniboxNavigationsUsedPrerenderCount%s",
-                     PrerenderManager::GetModeString()).c_str(),
-        1);
+                     PrerenderManager::GetModeString()), 1, 2);
   }
 }