Adding an Android about:flags feature for offline previews

chrome/browser/flag_descriptions.cc

Index: chrome/browser/flag_descriptions.cc
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index 5caa2b0a2fde99dd065ca9106e9cb2b2fd7b299d..6037dd265e140d7e090112ed3db8ec867f200316 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -1211,6 +1211,11 @@ const char kEnableDataReductionProxySiteBreakdownName[] =
 const char kEnableDataReductionProxySiteBreakdownDescription[] =
     "Enable the site breakdown on the Data Saver settings page.";
 
+const char kEnableOfflinePreviewsName[] = "Offline Page Previews";
+
+const char kEnableOfflinePreviewsDescription[] =
+    "Enable showing offline page previews on slow networks.";
+
 #endif  // defined(OS_ANDROID)
 
 const char kLcdTextName[] = "LCD text antialiasing";