ThumbnailTabHelper: Capture thumbnail when page load finishes

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 0989d5f39a7030b0ddfe553eec3230516590ece1..95db5bfe56489dd3460642e26874ae3a69cc52ac 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -3096,4 +3096,11 @@ const char kEnableHeapProfilingModeNative[] = "Enabled (native mode)";
 
 const char kEnableHeapProfilingTaskProfiler[] = "Enabled (task mode)";
 
+const char kCaptureThumbnailOnLoadFinishedName[] =
+    "Capture page thumbnail on load finished";
+
+const char kCaptureThumbnailOnLoadFinishedDescription[] =
+    "Capture a page thumbnail (for use on the New Tab page) when the page load "
+    "finishes, in addition to other times a thumbnail may be captured.";
+
 }  // namespace flag_descriptions