Adds kind-of-live thumbnail generation for a potential tab switcher.

chrome/browser/browser_process_impl.h

 // Copyright (c) 2006-2008 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.
 
 // When each service is created, we set a flag indicating this. At this point,
 // the service initialization could fail or succeed. This allows us to remember
 // if we tried to create a service, and not try creating it over and over if
 // the creation failed.
 
 #ifndef CHROME_BROWSER_BROWSER_PROCESS_IMPL_H__
 #define CHROME_BROWSER_BROWSER_PROCESS_IMPL_H__
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/message_loop.h"
 #include "base/non_thread_safe.h"
 #include "base/scoped_ptr.h"
 #include "chrome/browser/automation/automation_provider_list.h"
 #include "chrome/browser/browser_process.h"
+#include "chrome/browser/tab_contents/thumbnail_generator.h"
 
 #if defined(OS_WIN)
 #include "sandbox/src/sandbox.h"
 #else
 #include "chrome/common/temp_scaffolding_stubs.h"
 #endif
 
 class CommandLine;
 class NotificationService;
 
@@ skipping 232 matching lines @@
   // Ensures that all the print jobs are finished before closing the browser.
   scoped_ptr<printing::PrintJobManager> print_job_manager_;
 
   std::wstring locale_;
 
   MemoryModel memory_model_;
 
   bool checked_for_new_frames_;
   bool using_new_frames_;
 
+#if defined(LINUX2)
+  // TODO(brettw) enable this for all builds when we have a need for it. This
+  // component has some overhead, so we don't want to have it running without
+  // any consumers. Since it integrates by listening to notifications, it's
+  // sufficient to just not instatiate it to make it disabled.
+
+  // This service just sits around and makes thumanails for tabs.
+  ThumbnailGenerator thumbnail_generator_;
+#endif
+
   // An event that notifies when we are shutting-down.
   scoped_ptr<base::WaitableEvent> shutdown_event_;
 
   DISALLOW_EVIL_CONSTRUCTORS(BrowserProcessImpl);
 };
 
 #endif  // CHROME_BROWSER_BROWSER_PROCESS_IMPL_H__