Add API stubs for GCD device commands.

extensions/browser/extension_function_histogram_value.h

Index: extensions/browser/extension_function_histogram_value.h
diff --git a/extensions/browser/extension_function_histogram_value.h b/extensions/browser/extension_function_histogram_value.h
index 57deac346d1c75ebadb2cfd02e6881f8161e4f3c..8003a518410834f5a4ee73f65fa7cb7b08565101 100644
--- a/extensions/browser/extension_function_histogram_value.h
+++ b/extensions/browser/extension_function_histogram_value.h
@@ -884,14 +884,19 @@ enum HistogramValue {
   GCDPRIVATE_GETCLOUDDEVICELIST,
   GCDPRIVATE_QUERYFORNEWLOCALDEVICES,
   GCDPRIVATE_STARTSETUP,
-  GCDPRIVATE_SETWIFINETWORKS,
-  GCDPRIVATE_SETWIFICREDENTIALS,
+  GCDPRIVATE_SETWIFINETWORK,
+  GCDPRIVATE_SETWIFIPASSWORD,
   GCDPRIVATE_CONFIRMCODE,
   GCDPRIVATE_STOPSETUP,
   TABS_SETZOOM,
   TABS_GETZOOM,
   TABS_SETZOOMSETTINGS,
   TABS_GETZOOMSETTINGS,
+  GCDPRIVATE_GETCOMMANDDEFINITIONS,
+  GCDPRIVATE_INSERTCOMMAND,
+  GCDPRIVATE_GETCOMMAND,
+  GCDPRIVATE_CANCELCOMMAND,
+  GCDPRIVATE_GETCOMMANDSLIST,
   // Last entry: Add new entries above and ensure to update
   // tools/metrics/histograms/histograms/histograms.xml.
   ENUM_BOUNDARY