Cleanup: Use http/https constants in components.

components/translate/core/common/translate_metrics.cc

Index: components/translate/core/common/translate_metrics.cc
diff --git a/components/translate/core/common/translate_metrics.cc b/components/translate/core/common/translate_metrics.cc
index f17a11eca00fcc150c4019dbef560db51c017c93..2c64b5295979c24fc3c25bd105b086db4c8a856a 100644
--- a/components/translate/core/common/translate_metrics.cc
+++ b/components/translate/core/common/translate_metrics.cc
@@ -6,6 +6,7 @@
 
 #include "base/basictypes.h"
 #include "base/metrics/histogram.h"
+#include "url/url_constants.h"
 
 namespace translate {
 
@@ -24,9 +25,6 @@ const char kTranslateUserActionDuration[] = "Translate.UserActionDuration";
 const char kTranslatePageScheme[] = "Translate.PageScheme";
 const char kTranslateSimilarLanguageMatch[] = "Translate.SimilarLanguageMatch";
 
-const char kSchemeHttp[] = "http";
-const char kSchemeHttps[] = "https";
-
 struct MetricsEntry {
   MetricsNameIndex index;
   const char* const name;
@@ -106,9 +104,9 @@ void ReportUserActionDuration(base::TimeTicks begin, base::TimeTicks end) {
 
 void ReportPageScheme(const std::string& scheme) {
   SchemeType type = SCHEME_OTHERS;
-  if (scheme == kSchemeHttp)
+  if (scheme == url::kHttpScheme)
     type = SCHEME_HTTP;
-  else if (scheme == kSchemeHttps)
+  else if (scheme == url::kHttpsScheme)
     type = SCHEME_HTTPS;
   UMA_HISTOGRAM_ENUMERATION(kTranslatePageScheme, type, SCHEME_MAX);
 }