Store the NSEvent.description in a crash key in -[BrowserCrApplication sendEvent:].

chrome/common/crash_keys.cc

Index: chrome/common/crash_keys.cc
diff --git a/chrome/common/crash_keys.cc b/chrome/common/crash_keys.cc
index 800f7045f41aa64b88fed3fd4a3250f97583fa27..db8e7144a86b8bd60ddea71dd714ffcb230cfaa5 100644
--- a/chrome/common/crash_keys.cc
+++ b/chrome/common/crash_keys.cc
@@ -82,6 +82,8 @@ const char kNSExceptionTrace[] = "nsexception_bt";
 
 const char kSendAction[] = "sendaction";
 
+const char kNSEvent[] = "nsevent";
+
 }  // namespace mac
 #endif
 
@@ -156,6 +158,7 @@ size_t RegisterChromeCrashKeys() {
     { mac::kNSException, kMediumSize },
     { mac::kNSExceptionTrace, kMediumSize },
     { mac::kSendAction, kMediumSize },
+    { mac::kNSEvent, kMediumSize },
     { mac::kZombie, kMediumSize },
     { mac::kZombieTrace, kMediumSize },
     // content/: