Re-enable in-browser thumbnailing for Linux and Chrome OS.

chrome/common/chrome_switches.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/common/chrome_switches.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 
 namespace switches {
@@ skipping 1161 matching lines @@
 #else
 // Enable print preview (no PDF viewer, thus not supported with Chromium).
 const char kEnablePrintPreview[]            = "enable-print-preview";
 
 bool IsPrintPreviewEnabled() {
   return CommandLine::ForCurrentProcess()->HasSwitch(kEnablePrintPreview);
 }
 #endif
 
 bool IsInBrowserThumbnailingEnabled() {
+#if defined(OS_LINUX) || defined(OS_CHROMEOS)
+  // The in-browser-thumbnailing is enabled for Linux and Chrome OS.
+  return true;
+#else
   return CommandLine::ForCurrentProcess()->HasSwitch(
       kEnableInBrowserThumbnailing);
+#endif
 }
 
 // -----------------------------------------------------------------------------
 // DO NOT ADD YOUR CRAP TO THE BOTTOM OF THIS FILE.
 //
 // You were going to just dump your switches here, weren't you? Instead,
 // please put them in alphabetical order above, or in order inside the
 // appropriate ifdef at the bottom. The order should match the header.
 // -----------------------------------------------------------------------------
 
 }  // namespace switches