[Linux]When cancelling a composition, only focus out/in the IM context when it has focus.

chrome/browser/renderer_host/gtk_im_context_wrapper.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/renderer_host/gtk_im_context_wrapper.h"
 
 #include <gdk/gdk.h>
 #include <gdk/gdkkeysyms.h>
 #include <gtk/gtk.h>
 #include <algorithm>
@@ skipping 252 matching lines @@
     return;
 
   DCHECK(!is_in_key_event_handler_);
 
   // To prevent any text from being committed when resetting the |context_|;
   is_in_key_event_handler_ = true;
 
   gtk_im_context_reset(context_);
   gtk_im_context_reset(context_simple_);
 
-  // Some input methods may not honour the reset call. Focusing out/in the
-  // |context_| to make sure it gets reset correctly.
-  gtk_im_context_focus_out(context_);
-  gtk_im_context_focus_in(context_);
+  if (is_focused_) {
+    // Some input methods may not honour the reset call. Focusing out/in the
+    // |context_| to make sure it gets reset correctly.
+    gtk_im_context_focus_out(context_);
+    gtk_im_context_focus_in(context_);
+  }
 
   is_composing_text_ = false;
   preedit_text_.clear();
   preedit_underlines_.clear();
   commit_text_.clear();
 
   is_in_key_event_handler_ = false;
 }
 
 bool GtkIMContextWrapper::NeedCommitByForwardingCharEvent() {
@@ skipping 332 matching lines @@
     } while (pango_attr_iterator_next(iter));
     pango_attr_iterator_destroy(iter);
   }
 
   // Use a black thin underline by default.
   if (underlines->empty()) {
     underlines->push_back(
         WebKit::WebCompositionUnderline(0, length, SK_ColorBLACK, false));
   }
 }