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

chrome/browser/speech/speech_input_bubble_gtk.cc

Index: chrome/browser/speech/speech_input_bubble_gtk.cc
diff --git a/chrome/browser/speech/speech_input_bubble_gtk.cc b/chrome/browser/speech/speech_input_bubble_gtk.cc
index 95c183fa6da77db6bcdc81ee813b8070df3e33e6..a8079b6cd6c0451af1c2e8be478a7652f4671f5c 100644
--- a/chrome/browser/speech/speech_input_bubble_gtk.cc
+++ b/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);
@@ -212,4 +212,3 @@ SpeechInputBubble* SpeechInputBubble::CreateNativeBubble(
     const gfx::Rect& element_rect) {
   return new SpeechInputBubbleGtk(tab_contents, delegate, element_rect);
 }
-