Add metrics to measure time elapsed between form load and form submission with or without Autofill.

chrome/browser/autofill/autofill_metrics.cc

Index: chrome/browser/autofill/autofill_metrics.cc
diff --git a/chrome/browser/autofill/autofill_metrics.cc b/chrome/browser/autofill/autofill_metrics.cc
index c3ad14927d3f8fa9b1d597e4e08a1f2218ec6996..dae51a2816aba0818d0f2db60dd8dbf35823373d 100644
--- a/chrome/browser/autofill/autofill_metrics.cc
+++ b/chrome/browser/autofill/autofill_metrics.cc
@@ -6,6 +6,7 @@
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
+#include "base/time.h"
 #include "chrome/browser/autofill/autofill_type.h"
 #include "chrome/browser/autofill/form_structure.h"
 #include "webkit/glue/form_data.h"
@@ -298,6 +299,44 @@ void AutofillMetrics::LogUserHappinessMetric(UserHappinessMetric metric) const {
                             NUM_USER_HAPPINESS_METRICS);
 }
 
+void AutofillMetrics::LogFormFillDurationFromLoadWithAutofill(
+    const base::TimeDelta& duration) const {
+  UMA_HISTOGRAM_CUSTOM_TIMES("Autofill.FillDuration.FromLoad.WithAutofill",
+                             duration,
+                             base::TimeDelta::FromMilliseconds(100),
+                             base::TimeDelta::FromMinutes(10),
+                             50);
+}
+
+void AutofillMetrics::LogFormFillDurationFromLoadWithoutAutofill(
+    const base::TimeDelta& duration) const {
+  UMA_HISTOGRAM_CUSTOM_TIMES("Autofill.FillDuration.FromLoad.WithoutAutofill",
+                             duration,
+                             base::TimeDelta::FromMilliseconds(100),
+                             base::TimeDelta::FromMinutes(10),
+                             50);
+}
+
+void AutofillMetrics::LogFormFillDurationFromInteractionWithAutofill(
+    const base::TimeDelta& duration) const {
+  UMA_HISTOGRAM_CUSTOM_TIMES(
+      "Autofill.FillDuration.FromInteraction.WithAutofill",
+      duration,
+      base::TimeDelta::FromMilliseconds(100),
+      base::TimeDelta::FromMinutes(10),
+      50);
+}
+
+void AutofillMetrics::LogFormFillDurationFromInteractionWithoutAutofill(
+    const base::TimeDelta& duration) const {
+  UMA_HISTOGRAM_CUSTOM_TIMES(
+       "Autofill.FillDuration.FromInteraction.WithoutAutofill",
+       duration,
+       base::TimeDelta::FromMilliseconds(100),
+       base::TimeDelta::FromMinutes(10),
+       50);
+}
+
 void AutofillMetrics::LogIsAutofillEnabledAtStartup(bool enabled) const {
   UMA_HISTOGRAM_BOOLEAN("Autofill.IsEnabled.Startup", enabled);
 }