Create MetricsPrivateDelegate for metricsPrivate behavior

extensions/browser/api/extensions_api_client.h

Index: extensions/browser/api/extensions_api_client.h
diff --git a/extensions/browser/api/extensions_api_client.h b/extensions/browser/api/extensions_api_client.h
index 126b6e0f86f40298580195067ae17a9a2d6bcd1b..2d2e609373ec11dc90c842e1ab9c2c9f74a46077 100644
--- a/extensions/browser/api/extensions_api_client.h
+++ b/extensions/browser/api/extensions_api_client.h
@@ -36,6 +36,7 @@ class DevicePermissionsPrompt;
 class ExtensionOptionsGuest;
 class ExtensionOptionsGuestDelegate;
 class ManagementAPIDelegate;
+class MetricsPrivateDelegate;
 class MimeHandlerViewGuest;
 class MimeHandlerViewGuestDelegate;
 class RulesCacheDelegate;
@@ -127,6 +128,12 @@ class ExtensionsAPIClient {
   // Creates a delegate for handling the management extension api.
   virtual ManagementAPIDelegate* CreateManagementAPIDelegate() const;
 
+  // Creates a delegate for MetricsPrivateAPI behavior dependent on the
+  // embedder. TODO(michaelpg): Consolidate with embedder-dependent interfaces
+  // in //components/metrics as app_shell support for metrics is completed.
+  virtual std::unique_ptr<MetricsPrivateDelegate> CreateMetricsPrivateDelegate()
+      const;
+
   // NOTE: If this interface gains too many methods (perhaps more than 20) it
   // should be split into one interface per API.
 };