Remove OnRecordingDisabled() metrics client interface.

android_webview/browser/aw_metrics_service_client.cc

Index: android_webview/browser/aw_metrics_service_client.cc
diff --git a/android_webview/browser/aw_metrics_service_client.cc b/android_webview/browser/aw_metrics_service_client.cc
index 3129fe9df65064f791f6c049afb13289da49c0c8..7ef4741146ef803f988f6d5148a93982cc89eecf 100644
--- a/android_webview/browser/aw_metrics_service_client.cc
+++ b/android_webview/browser/aw_metrics_service_client.cc
@@ -159,13 +159,11 @@ metrics::MetricsService* AwMetricsServiceClient::GetMetricsService() {
 
 // In Chrome, UMA and Breakpad are enabled/disabled together by the same
 // checkbox and they share the same client ID (a.k.a. GUID). SetMetricsClientId
-// and OnRecordingDisabled are intended to provide the ID to Breakpad. In
-// WebView, UMA and Breakpad are independent, so these are no-ops.
+// is intended to provide the ID to Breakpad. In WebView, UMA and Breakpad are
+// independent, so this is a no-op.
 
 void AwMetricsServiceClient::SetMetricsClientId(const std::string& client_id) {}
 
-void AwMetricsServiceClient::OnRecordingDisabled() {}
-
 bool AwMetricsServiceClient::IsOffTheRecordSessionActive() {
   // WebView has no incognito mode.
   return false;