Revert of [Mac] Preserve original selection when suggesting completions with diacritics

chrome/browser/ui/cocoa/omnibox/omnibox_view_mac_browsertest.mm

Index: chrome/browser/ui/cocoa/omnibox/omnibox_view_mac_browsertest.mm
diff --git a/chrome/browser/ui/cocoa/omnibox/omnibox_view_mac_browsertest.mm b/chrome/browser/ui/cocoa/omnibox/omnibox_view_mac_browsertest.mm
index 5b9525dede6a4f550f42abf5ad44ca5eb356ce97..0d40dfffd3f11686dc3159d9696722e201acd17a 100644
--- a/chrome/browser/ui/cocoa/omnibox/omnibox_view_mac_browsertest.mm
+++ b/chrome/browser/ui/cocoa/omnibox/omnibox_view_mac_browsertest.mm
@@ -94,22 +94,3 @@
   pasteboard_string = [pasteboard->get() stringForType:NSPasteboardTypeString];
   EXPECT_EQ(text, pasteboard_string.UTF8String);
 }
-
-// Verify that copying text from the omnibox into the pasteboard works with
-// a selection that begins on a combining character.
-IN_PROC_BROWSER_TEST_F(OmniboxViewMacBrowserTest, CopyToPasteboardDiacritic) {
-  base::string16 text = base::UTF8ToUTF16("สวัสดี");
-
-  scoped_refptr<ui::UniquePasteboard> pasteboard = new ui::UniquePasteboard;
-  [[GetOmnibox()->field() currentEditor]
-      setString:base::SysUTF16ToNSString(text)];
-  [[GetOmnibox()->field() currentEditor]
-      setSelectedRange:NSMakeRange(2, text.size() - 2)];
-
-  GetOmnibox()->model()->SetUserText(text);
-  GetOmnibox()->CopyToPasteboard(pasteboard->get());
-
-  NSString* pasteboard_string =
-      [pasteboard->get() stringForType:NSPasteboardTypeString];
-  EXPECT_EQ(text.substr(2, 4), base::SysNSStringToUTF16(pasteboard_string));
-}