OmniboxView: Attempt to fix a crash in GetSelectedText().

chrome/browser/ui/views/omnibox/omnibox_view_win.cc

Index: chrome/browser/ui/views/omnibox/omnibox_view_win.cc
diff --git a/chrome/browser/ui/views/omnibox/omnibox_view_win.cc b/chrome/browser/ui/views/omnibox/omnibox_view_win.cc
index 806cd51e3d1e9bffe39848c063d83bac3d50d247..089503d2f4d8c4649f20e9c175551ab31e40b9d6 100644
--- a/chrome/browser/ui/views/omnibox/omnibox_view_win.cc
+++ b/chrome/browser/ui/views/omnibox/omnibox_view_win.cc
@@ -611,6 +611,9 @@ void OmniboxViewWin::OpenMatch(const AutocompleteMatch& match,
 
 string16 OmniboxViewWin::GetText() const {
   const int len = GetTextLength() + 1;
+  if (len <= 1)
+    return string16();
+
   string16 str;
   GetWindowText(WriteInto(&str, len), len);
   return str;
@@ -2109,6 +2112,8 @@ string16 OmniboxViewWin::GetSelectedText() const {
   // Figure out the length of the selection.
   CHARRANGE sel;
   GetSel(sel);
+  if (sel.cpMin == sel.cpMax)  // GetSelText() crashes on NULL input.
+    return string16();
 
   // Grab the selected text.
   string16 str;