Make FindBar obey dialog bounds for GTK. Will fix other platforms in separate patches.

chrome/browser/ui/gtk/find_bar_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/ui/gtk/find_bar_gtk.h"
 
 #include <gdk/gdkkeysyms.h>
 
 #include <algorithm>
 #include <string>
@@ skipping 555 matching lines @@
                NULL);
   std::string contents(gtk_entry_get_text(GTK_ENTRY(text_entry_)));
   return UTF8ToUTF16(contents.substr(cursor_pos, selection_bound));
 }
 
 string16 FindBarGtk::GetMatchCountText() {
   std::string contents(gtk_label_get_text(GTK_LABEL(match_count_label_)));
   return UTF8ToUTF16(contents);
 }
 
+int FindBarGtk::GetWidth() {
+  return container_->allocation.width;
+}
+
 void FindBarGtk::FindEntryTextInContents(bool forward_search) {
   TabContentsWrapper* tab_contents = find_bar_controller_->tab_contents();
   if (!tab_contents)
     return;
   FindTabHelper* find_tab_helper = tab_contents->find_tab_helper();
 
   std::string new_contents(gtk_entry_get_text(GTK_ENTRY(text_entry_)));
 
   if (new_contents.length() > 0) {
     find_tab_helper->StartFinding(UTF8ToUTF16(new_contents), forward_search,
@@ skipping 391 matching lines @@
 
 // static
 gboolean FindBarGtk::OnFocusOut(GtkWidget* entry, GdkEventFocus* event,
                                 FindBarGtk* find_bar) {
   g_signal_handlers_disconnect_by_func(
       gdk_keymap_get_for_display(gtk_widget_get_display(entry)),
       reinterpret_cast<gpointer>(&OnKeymapDirectionChanged), find_bar);
 
   return FALSE;  // Continue propagation.
 }