Implement important sites dialog for desktop.

chrome/browser/ui/webui/metrics_handler.cc

Index: chrome/browser/ui/webui/metrics_handler.cc
diff --git a/chrome/browser/ui/webui/metrics_handler.cc b/chrome/browser/ui/webui/metrics_handler.cc
index f5b212372a8735c4eb02f3c1da45575404f83d26..21fcb2cb0bb5e8480b5fb4513565ad5b48790884 100644
--- a/chrome/browser/ui/webui/metrics_handler.cc
+++ b/chrome/browser/ui/webui/metrics_handler.cc
@@ -32,6 +32,10 @@ void MetricsHandler::RegisterMessages() {
       base::Bind(&MetricsHandler::HandleRecordInHistogram,
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback(
+      "metricsHandler:recordBooleanHistogram",
+      base::Bind(&MetricsHandler::HandleRecordBooleanHistogram,
+                 base::Unretained(this)));
+  web_ui()->RegisterMessageCallback(
       "metricsHandler:recordTime",
       base::Bind(&MetricsHandler::HandleRecordTime, base::Unretained(this)));
   web_ui()->RegisterMessageCallback(
@@ -78,6 +82,19 @@ void MetricsHandler::HandleRecordInHistogram(const base::ListValue* args) {
   counter->Add(int_value);
 }
 
+void MetricsHandler::HandleRecordBooleanHistogram(const base::ListValue* args) {
+  std::string histogram_name;
+  bool value;
+  if (!args->GetString(0, &histogram_name) || !args->GetBoolean(1, &value)) {
+    NOTREACHED();
+    return;
+  }
+
+  base::HistogramBase* counter = base::BooleanHistogram::FactoryGet(
+      histogram_name, base::HistogramBase::kUmaTargetedHistogramFlag);
+  counter->AddBoolean(value);
+}
+
 void MetricsHandler::HandleRecordTime(const base::ListValue* args) {
   std::string histogram_name;
   double value;