Include Google Update integration details in crash keys and about:version.

chrome/common/crash_keys.h

Index: chrome/common/crash_keys.h
diff --git a/chrome/common/crash_keys.h b/chrome/common/crash_keys.h
index 142bd8403f3979c22cb40192ba00b393e16b2374..7abe2086fe352098089178e59ac16a4431b0d05e 100644
--- a/chrome/common/crash_keys.h
+++ b/chrome/common/crash_keys.h
@@ -87,6 +87,12 @@ extern const char kThirdPartyModulesNotLoaded[];
 
 // Whether the machine is enterprise managed (only sent on Windows).
 extern const char kIsEnterpriseManaged[];
+
+// The "ap" (additional parameters) value in Chrome's ClientState registry key.
+extern const char kApValue[];
+
+// The "name" value in Chrome's ClientState\cohort registry key.
+extern const char kCohortName[];
 #endif
 
 // Number of input event send IPC failures. Added to debug