[Mac] Additional crash logging for -sendEvent: crash.

chrome/browser/chrome_browser_application_mac.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/chrome_browser_application_mac.h"
 
 #import "base/auto_reset.h"
 #import "base/logging.h"
 #include "base/mac/crash_logging.h"
 #import "base/mac/scoped_nsexception_enabler.h"
@@ skipping 413 matching lines @@
 
 - (BOOL)isHandlingSendEvent {
   return handlingSendEvent_;
 }
 
 - (void)setHandlingSendEvent:(BOOL)handlingSendEvent {
   handlingSendEvent_ = handlingSendEvent;
 }
 
 - (void)sendEvent:(NSEvent*)event {
+  // TODO(shess): Squirrel away some info to direct debugging.
+  // Current hypothesis is that it's a keyboard accelerator.
+  // http://crbug.com/154483
+  static NSString* const kSendEventKey = @"sendevent";
+  base::mac::ScopedCrashKey key(kSendEventKey, [event description]);
+
   base::mac::ScopedSendingEvent sendingEventScoper;
   for (id<CrApplicationEventHookProtocol> handler in eventHooks_.get()) {
     [handler hookForEvent:event];
   }
   [super sendEvent:event];
 }
 
 // NSExceptions which are caught by the event loop are logged here.
 // NSException uses setjmp/longjmp, which can be very bad for C++, so
 // we attempt to track and report them.
@@ skipping 131 matching lines @@
   std::vector<NSWindow*>::iterator window_iterator =
       std::find(previousKeyWindows_.begin(),
                 previousKeyWindows_.end(),
                 window);
   if (window_iterator != previousKeyWindows_.end()) {
     previousKeyWindows_.erase(window_iterator);
   }
 }
 
 @end