Upstream USB web debugging enabled user pref.

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 62f3a03471f5ce0a9d2cd4d05d23a06a2856b233..bae6df8ebd06fd9bee5fda8bbc8864fe8aecaf59 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -1561,6 +1561,11 @@ const char kDevToolsHSplitLocation[] = "devtools.split_location";
 // Integer location of the vertical split bar in the browser view.
 const char kDevToolsVSplitLocation[] = "devtools.v_split_location";
 
+#if defined(OS_ANDROID)
+// A boolean specifying whether remote dev tools debugging is enabled.
+const char kDevToolsRemoteEnabled[] = "devtools.remote_enabled";
+#endif
+
 // Maps of files edited locally using DevTools.
 const char kDevToolsEditedFiles[] = "devtools.edited_files";