Fix acquisition of thumbnail images in Linux

chrome/browser/renderer_host/backing_store_x.cc

 // Copyright (c) 2010 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/renderer_host/backing_store_x.h"
 
 #include <cairo-xlib.h>
 #include <gtk/gtk.h>
 #include <stdlib.h>
 #include <sys/ipc.h>
@@ skipping 308 matching lines @@
     // Use shared memory for faster copies when it's available.
     Visual* visual = static_cast<Visual*>(visual_);
     memset(&shminfo, 0, sizeof(shminfo));
     image = XShmCreateImage(display_, visual, 32,
                             ZPixmap, NULL, &shminfo, width, height);
     if (!image) {
       return false;
     }
     // Create the shared memory segment for the image and map it.
     if (image->bytes_per_line == 0 || image->height == 0 ||
-        (std::numeric_limits<size_t>::max() / image->bytes_per_line) >
-        static_cast<size_t>(image->height)) {
+        static_cast<size_t>(image->height) >
+        (std::numeric_limits<size_t>::max() / image->bytes_per_line)) {
       XDestroyImage(image);
       return false;
     }
     shminfo.shmid = shmget(IPC_PRIVATE, image->bytes_per_line * image->height,
                            IPC_CREAT|0666);
     if (shminfo.shmid == -1) {
       XDestroyImage(image);
       return false;
     }
 
@@ skipping 126 matching lines @@
   cairo_set_source(cr, pattern);
   cairo_pattern_destroy(pattern);
 
   cairo_identity_matrix(cr);
 
   cairo_rectangle(cr, rect.x(), rect.y(), rect.width(), rect.height());
   cairo_fill(cr);
   cairo_destroy(cr);
 }
 #endif