Fix captive portal compile issues for android.

chrome/browser/interstitials/chrome_metrics_helper.cc

Index: chrome/browser/interstitials/chrome_metrics_helper.cc
diff --git a/chrome/browser/interstitials/chrome_metrics_helper.cc b/chrome/browser/interstitials/chrome_metrics_helper.cc
index abda1aa30b948165a71ea6175f0ff2b65dc9d58a..711ecf10b11049aa0100ef01550dd619f8f1429d 100644
--- a/chrome/browser/interstitials/chrome_metrics_helper.cc
+++ b/chrome/browser/interstitials/chrome_metrics_helper.cc
@@ -7,7 +7,6 @@
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/history/history_service_factory.h"
 #include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/ssl/captive_portal_metrics_recorder.h"
 #include "components/history/core/browser/history_service.h"
 #include "components/rappor/rappor_service.h"
 #include "content/public/browser/web_contents.h"
@@ -16,6 +15,10 @@
 #include "chrome/browser/extensions/api/experience_sampling_private/experience_sampling.h"
 #endif
 
+#if defined(ENABLE_CAPTIVE_PORTAL_DETECTION)
+#include "chrome/browser/ssl/captive_portal_metrics_recorder.h"
+#endif
+
 ChromeMetricsHelper::ChromeMetricsHelper(
     content::WebContents* web_contents,
     const GURL& request_url,
@@ -37,15 +40,19 @@ ChromeMetricsHelper::ChromeMetricsHelper(
 ChromeMetricsHelper::~ChromeMetricsHelper() {}
 
 void ChromeMetricsHelper::StartRecordingCaptivePortalMetrics(bool overridable) {
+#if defined(ENABLE_CAPTIVE_PORTAL_DETECTION)
   captive_portal_recorder_.reset(
       new CaptivePortalMetricsRecorder(web_contents_, overridable));
+#endif
 }
 
 void ChromeMetricsHelper::RecordExtraShutdownMetrics() {
+#if defined(ENABLE_CAPTIVE_PORTAL_DETECTION)
   // The captive portal metrics should be recorded when the interstitial is
   // closing (or destructing).
   if (captive_portal_recorder_)
     captive_portal_recorder_->RecordCaptivePortalUMAStatistics();
+#endif
 }
 
 void ChromeMetricsHelper::RecordExtraUserDecisionMetrics(