[Mac] Ignore spell-checker exceptions.

base/mac/scoped_nsexception_enabler.h

Index: base/mac/scoped_nsexception_enabler.h
diff --git a/base/mac/scoped_nsexception_enabler.h b/base/mac/scoped_nsexception_enabler.h
index 3c16d2f5679035395dc426c879f50e5313724264..93242abf954e5757b09cb1fd587673fdd17b52f6 100644
--- a/base/mac/scoped_nsexception_enabler.h
+++ b/base/mac/scoped_nsexception_enabler.h
@@ -6,6 +6,8 @@
 #define BASE_MAC_SCOPED_NSEXCEPTION_ENABLER_H_
 #pragma once
 
+#import <Foundation/Foundation.h>
+
 #include "base/base_export.h"
 #include "base/basictypes.h"
 
@@ -41,6 +43,11 @@ class BASE_EXPORT ScopedNSExceptionEnabler {
 BASE_EXPORT bool GetNSExceptionsAllowed();
 BASE_EXPORT void SetNSExceptionsAllowed(bool allowed);
 
+// Calls [target performSelector:sel] with fatal-exceptions turned

[Nico, 2011/12/09 22:01:07]

// Calls -performSelector:sel …

+// off, and returns the result.  If an exception is thrown during the
+// perform, nil is returned.
+BASE_EXPORT id PerformSelectorIgnoringExceptions(NSObject* target, SEL sel);

[Scott Hess - ex-Googler, 2011/12/09 01:46:28]

I wanted to have:

@implementation NSObject (AddlStuff)
- (id)performSelectorIgnoringExceptions:(SEL)aSel;
@end

But no @implementation allowed in base/, unfortunately.  I did prototype
something which ran a base::Callback<id(void)>, but I got nervous about someone
running C++ code in there - I think this is about as close to "Only run
Objective-C code when exceptions enabled" as is reasonable.

+
 }  // namespace mac
 }  // namespace base