Fix speech input bubble in GTK to avoid setting images when not visible.

chrome/browser/speech/speech_input_bubble_gtk.cc

 // Copyright (c) 2011 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/speech/speech_input_bubble.h"
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/browser/ui/gtk/gtk_theme_provider.h"
 #include "chrome/browser/ui/gtk/gtk_util.h"
@@ skipping 178 matching lines @@
     } else {
       gtk_label_set_text(GTK_LABEL(label_),
           l10n_util::GetStringUTF8(IDS_SPEECH_INPUT_BUBBLE_WORKING).c_str());
     }
     gtk_widget_show(icon_);
     gtk_widget_hide(try_again_button_);
   }
 }
 
 void SpeechInputBubbleGtk::SetImage(const SkBitmap& image) {
-  if (image.isNull())
+  if (image.isNull() || !info_bubble_)
     return;
 
   GdkPixbuf* pixbuf = gfx::GdkPixbufFromSkBitmap(&image);
   gtk_image_set_from_pixbuf(GTK_IMAGE(icon_), pixbuf);
   g_object_unref(pixbuf);
 }
 
 }  // namespace
 
 SpeechInputBubble* SpeechInputBubble::CreateNativeBubble(
     TabContents* tab_contents,
     Delegate* delegate,
     const gfx::Rect& element_rect) {
   return new SpeechInputBubbleGtk(tab_contents, delegate, element_rect);
 }
-