Adding more histograms to ResourcePrefetchPredictor.

chrome/browser/predictors/resource_prefetch_predictor_tables.cc

Index: chrome/browser/predictors/resource_prefetch_predictor_tables.cc
diff --git a/chrome/browser/predictors/resource_prefetch_predictor_tables.cc b/chrome/browser/predictors/resource_prefetch_predictor_tables.cc
index 914c439986432fd10ed23a25279d0171969c6d01..d9caf3abadf8b2e761dde7f515a29ec41e4c5edc 100644
--- a/chrome/browser/predictors/resource_prefetch_predictor_tables.cc
+++ b/chrome/browser/predictors/resource_prefetch_predictor_tables.cc
@@ -7,6 +7,7 @@
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/stringprintf.h"
+#include "chrome/browser/predictors/resource_prefetch_predictor.h"
 #include "content/public/browser/browser_thread.h"
 #include "sql/statement.h"
 
@@ -244,17 +245,21 @@ void ResourcePrefetchPredictorTables::CreateTableIfNonExistent() {
     ResetDB();
 }
 
-void ResourcePrefetchPredictorTables::LogDatabaseStats()  {
+void ResourcePrefetchPredictorTables::LogDatabaseStats(Profile* profile)  {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::DB));
+
+  if (!ResourcePrefetchPredictor::IsEnabled(profile))
+    return;
+
   if (CantAccessDatabase())
     return;
 
-  sql::Statement url_statement(DB()->GetUniqueStatement(
+  sql::Statement total_rows_statement(DB()->GetUniqueStatement(
       base::StringPrintf("SELECT count(*) FROM %s",
                          kResourcePredictorUrlTableName).c_str()));
-  if (url_statement.Step())
+  if (total_rows_statement.Step())
     UMA_HISTOGRAM_COUNTS("ResourcePrefetchPredictor.UrlTableRowCount",
-                         url_statement.ColumnInt(0));
+                         total_rows_statement.ColumnInt(0));
 }
 
 }  // namespace predictors