[Downloads] Move client guid for AV scanning of downloaded files to chrome/

chrome/common/chrome_constants.cc

Index: chrome/common/chrome_constants.cc
diff --git a/chrome/common/chrome_constants.cc b/chrome/common/chrome_constants.cc
index 874a03938940f1e842bf6c1e6857c5a008d9d501..40621f83b0c9a961afd845b9520a762c3fe5774f 100644
--- a/chrome/common/chrome_constants.cc
+++ b/chrome/common/chrome_constants.cc
@@ -253,6 +253,12 @@ const wchar_t kLaunchModeValue[] = L"launch_mode";
 const char kProfileDirPrefix[] = "u-";
 #endif
 
+// This GUID is associated with any 'don't ask me again' settings that the
+// user can select for different file types.
+// {2676A9A2-D919-4FEE-9187-152100393AB2}
+const char kApplicationClientIDStringForAVScanning[] =
+    "2676A9A2-D919-4FEE-9187-152100393AB2";
+
 }  // namespace chrome
 
 #undef FPL