Add a temporary crash key to debug nib loading issues.

chrome/browser/ui/cocoa/toolbar/toolbar_controller.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/ui/cocoa/toolbar/toolbar_controller.h"
 
+#include <sys/stat.h>
 #include <algorithm>
 
+#include "base/debug/crash_logging.h"
 #include "base/mac/bundle_locations.h"
 #include "base/mac/foundation_util.h"
 #include "base/mac/mac_util.h"
 #include "base/mac/sdk_forward_declarations.h"
 #include "base/macros.h"
 #include "base/memory/singleton.h"
 #include "base/strings/string_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
@@ skipping 26 matching lines @@
 #import "chrome/browser/ui/cocoa/toolbar/app_toolbar_button.h"
 #import "chrome/browser/ui/cocoa/toolbar/app_toolbar_button_cell.h"
 #import "chrome/browser/ui/cocoa/toolbar/back_forward_menu_controller.h"
 #import "chrome/browser/ui/cocoa/toolbar/reload_button_cocoa.h"
 #import "chrome/browser/ui/cocoa/toolbar/toolbar_button_cocoa.h"
 #import "chrome/browser/ui/cocoa/toolbar/toolbar_view_cocoa.h"
 #import "chrome/browser/ui/cocoa/view_id_util.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/toolbar/app_menu_icon_controller.h"
 #include "chrome/browser/ui/toolbar/app_menu_model.h"
+#include "chrome/common/crash_keys.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/grit/chromium_strings.h"
 #include "chrome/grit/generated_resources.h"
 #include "chrome/grit/theme_resources.h"
 #include "components/metrics/proto/omnibox_event.pb.h"
 #include "components/omnibox/browser/autocomplete_classifier.h"
 #include "components/omnibox/browser/autocomplete_match.h"
 #include "components/omnibox/browser/omnibox_edit_model.h"
 #include "components/omnibox/browser/omnibox_view.h"
 #include "components/prefs/pref_service.h"
@@ skipping 180 matching lines @@
 // Now we can hook up bridges that rely on UI objects such as the location bar
 // and button state. -viewDidLoad is the recommended way to do this in 10.10
 // SDK. When running on 10.10 or above -awakeFromNib still works but for some
 // reason is not guaranteed to be called (http://crbug.com/526276), so implement
 // both.
 - (void)awakeFromNib {
   [self viewDidLoad];
 }
 
 - (void)viewDidLoad {
+  // Temporary: collect information about a potentially missing or inaccessible
+  // nib (https://crbug.com/685985)
+  NSString* nibPath = [self.nibBundle pathForResource:@"Toolbar" ofType:@"nib"];
+  struct stat sb;
+  int nibErrno = 0;
+  if (stat(nibPath.fileSystemRepresentation, &sb) != 0) {
+    nibErrno = errno;
+  }
+  NSString* closestPath = nibPath;
+  while (closestPath && stat(closestPath.fileSystemRepresentation, &sb) != 0) {
+    closestPath = [closestPath stringByDeletingLastPathComponent];
+  }
+  base::debug::ScopedCrashKey nibCrashKey {
+    crash_keys::mac::kToolbarNibInfo,
+        [NSString stringWithFormat:@"errno: %d nib: %@ closest: %@", nibErrno,
+                                   nibPath, closestPath]
+            .UTF8String
+  };
+
   // When linking and running on 10.10+, both -awakeFromNib and -viewDidLoad may
   // be called, don't initialize twice.
   if (locationBarView_) {
     DCHECK(base::mac::IsAtLeastOS10_10());
     return;
   }
 
   BOOL isRTL = cocoa_l10n_util::ShouldDoExperimentalRTLLayout();
   NSAutoresizingMaskOptions leadingButtonMask =
       isRTL ? NSViewMinXMargin | NSViewMinYMargin
@@ skipping 820 matching lines @@
 - (void)hideDropURLsIndicatorInView:(NSView*)view {
   // Do nothing.
 }
 
 // (URLDropTargetController protocol)
 - (BOOL)isUnsupportedDropData:(id<NSDraggingInfo>)info {
   return drag_util::IsUnsupportedDropData(profile_, info);
 }
 
 @end