Add flag to override Effective Connection Type

chrome/browser/flag_descriptions.h

Index: chrome/browser/flag_descriptions.h
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index 4103afb7ca797f0243280628c2cb49d955ea4f87..a67e52de1ce43c4c1b6af80524a1d9d4ff6cf6cb 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -3323,6 +3323,23 @@ extern const char kOmniboxDisplayTitleForCurrentUrlName[];
 // for current URL.
 extern const char kOmniboxDisplayTitleForCurrentUrlDescription[];
 
+// Name of the flag that forces Network Quality Estimator (NQE) to always
+// return the specified effective connection type.
+extern const char kForceEffectiveConnectionTypeName[];
+
+// Description of the flag that forces Network Quality Estimator (NQE) to always
+// return the specified effective connection type.
+extern const char kForceEffectiveConnectionTypeDescription[];
+
+// Description of the various effective connection type choices that can be
+// set using kForceEffectiveConnectionTypeName flag.
+extern const char kEffectiveConnectionTypeUnknownDescription[];
+extern const char kEffectiveConnectionTypeOfflineDescription[];
+extern const char kEffectiveConnectionTypeSlow2GDescription[];
+extern const char kEffectiveConnectionType2GDescription[];
+extern const char kEffectiveConnectionType3GDescription[];
+extern const char kEffectiveConnectionType4GDescription[];
+
 // Name & description for the heap profiling flag.
 extern const char kEnableHeapProfilingName[];
 extern const char kEnableHeapProfilingDescription[];