Remove base/mac/scoped_nsexception_enabler.h.

ui/base/clipboard/clipboard_mac.mm

Index: ui/base/clipboard/clipboard_mac.mm
diff --git a/ui/base/clipboard/clipboard_mac.mm b/ui/base/clipboard/clipboard_mac.mm
index e42a49f772df65a209df6debc9b854fb0e6bfe74..62331947ddf0d4f1118cb3c19b960faad8d3fecb 100644
--- a/ui/base/clipboard/clipboard_mac.mm
+++ b/ui/base/clipboard/clipboard_mac.mm
@@ -11,7 +11,6 @@
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
 #include "base/mac/scoped_cftyperef.h"
-#import "base/mac/scoped_nsexception_enabler.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/stl_util.h"
 #include "base/strings/sys_string_conversions.h"
@@ -307,9 +306,12 @@ SkBitmap ClipboardMac::ReadImage(ClipboardType type) const {
   // If the pasteboard's image data is not to its liking, the guts of NSImage
   // may throw, and that exception will leak. Prevent a crash in that case;
   // a blank image is better.
-  base::scoped_nsobject<NSImage> image(base::mac::RunBlockIgnoringExceptions(^{
-      return [[NSImage alloc] initWithPasteboard:GetPasteboard()];
-  }));
+  base::scoped_nsobject<NSImage> image;
+  @try {
+    image.reset([[NSImage alloc] initWithPasteboard:GetPasteboard()]);
+  } @catch (id exception) {
+  }
+
   SkBitmap bitmap;
   if (image.get()) {
     bitmap = gfx::NSImageToSkBitmapWithColorSpace(