Don't write image markup to the clipboard when copying images on OS X.

webkit/glue/webclipboard_impl.cc

Index: webkit/glue/webclipboard_impl.cc
diff --git a/webkit/glue/webclipboard_impl.cc b/webkit/glue/webclipboard_impl.cc
index 10dddab7ddc4adc02dd59cf252ee0ef1611066fa..875c6e4c6b1fed03218408f3afedb76b3fdb26db 100644
--- a/webkit/glue/webclipboard_impl.cc
+++ b/webkit/glue/webclipboard_impl.cc
@@ -179,13 +179,17 @@ void WebClipboardImpl::writeImage(
     scw.WriteBitmapFromPixels(bitmap.getPixels(), image.size());
   }
 
-  // When writing the image, we also write the image markup so that pasting
-  // into rich text editors, such as Gmail, reveals the image. We also don't
-  // want to call writeText(), since some applications (WordPad) don't pick the
-  // image if there is also a text format on the clipboard.
   if (!url.isEmpty()) {
     scw.WriteBookmark(title, url.spec());
+#if !defined(OS_MACOSX)
+    // When writing the image, we also write the image markup so that pasting
+    // into rich text editors, such as Gmail, reveals the image. We also don't
+    // want to call writeText(), since some applications (WordPad) don't pick
+    // the image if there is also a text format on the clipboard.
+    // We also don't want to write HTML on a Mac, since Mail.app prefers to use
+    // the image markup over attaching the actual image.

[Nico, 2011/06/09 16:11:38]

nit: Maybe add "See http://crbug.com/33016"

     scw.WriteHTML(UTF8ToUTF16(URLToImageMarkup(url, title)), "");
+#endif
   }
 }