Fix ibus-m17n crash due to wrong parameter from Chrome.

ui/base/ime/input_method_ibus.cc

Index: ui/base/ime/input_method_ibus.cc
diff --git a/ui/base/ime/input_method_ibus.cc b/ui/base/ime/input_method_ibus.cc
index cce1f3df04ca479ac372ea4447e5a0e11598b184..d54f55a3f06508a950c167feb58f2f277197ace7 100644
--- a/ui/base/ime/input_method_ibus.cc
+++ b/ui/base/ime/input_method_ibus.cc
@@ -267,13 +267,12 @@ void InputMethodIBus::OnCaretBoundsChanged(const TextInputClient* client) {
   previous_selection_range_ = selection_range;
   previous_surrounding_text_ = surrounding_text;
 
-  // In the original meaning of SetSurroundingText is not just selection text,
-  // but currently there are no way to retrieve surrounding text in
-  // TextInputClient.
   GetInputContextClient()->SetSurroundingText(
       UTF16ToUTF8(surrounding_text),
-      selection_range.start(), /* cursor position. */
-      selection_range.end()); /* selection anchor position. */
+      // cursor position.

[kinaba, 2013/04/10 04:30:04]

please add a comment that the position has to be given in the relative index
from surrounding_text

[Seigo Nonaka, 2013/04/10 05:15:54]

Done.

+      selection_range.start() - text_range.start(),
+      // selection anchor position.
+      selection_range.end() - text_range.start());
 }
 
 void InputMethodIBus::CancelComposition(const TextInputClient* client) {