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

The visibility of the speech input bubble was not being checked when a image was requested to be set. Consequently, this could lead to invalid image objects in some cases producing glib and GTK errors.

BUG=70223
TEST=none

Review URL: http://codereview.chromium.org/6272018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@72501 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/speech/speech_input_bubble_gtk.cc

@@ -196,7 +196,7 @@ void SpeechInputBubbleGtk::UpdateLayout() {
 }
 
 void SpeechInputBubbleGtk::SetImage(const SkBitmap& image) {
-  if (image.isNull())
+  if (image.isNull() || !info_bubble_)
     return;
 
   GdkPixbuf* pixbuf = gfx::GdkPixbufFromSkBitmap(&image);