Support 8bpp screens in X11

ui/base/x/x11_util.h

 // Copyright (c) 2012 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.
 
 #ifndef UI_BASE_X_X11_UTIL_H_
 #define UI_BASE_X_X11_UTIL_H_
 
 // This file declares utility functions for X11 (Linux only).
 //
 // These functions do not require the Xlib headers to be included (which is why
@@ skipping 40 matching lines @@
 // 2) SHM putimage,
 // 3) SHM pixmaps + putimage.
 enum SharedMemorySupport {
   SHARED_MEMORY_NONE,
   SHARED_MEMORY_PUTIMAGE,
   SHARED_MEMORY_PIXMAP
 };
 // Return the shared memory type of our X connection.
 UI_BASE_EXPORT SharedMemorySupport QuerySharedMemorySupport(XDisplay* dpy);
 
+// Return true iff the display supports Xrender
+UI_BASE_EXPORT bool QueryRenderSupport(XDisplay* dpy);
+
 // Returns an X11 Cursor, sharable across the process.
 // |cursor_shape| is an X font cursor shape, see XCreateFontCursor().
 UI_BASE_EXPORT ::Cursor GetXCursor(int cursor_shape);
 
 // Resets the cache used by GetXCursor(). Only useful for tests that may delete
 // the display.
 UI_BASE_EXPORT void ResetXCursorCache();
 
 // Creates a custom X cursor from the image. This takes ownership of image. The
 // caller must not free/modify the image. The refcount of the newly created
@@ skipping 261 matching lines @@
  private:
   ::Cursor cursor_;
   XDisplay* display_;
 
   DISALLOW_COPY_AND_ASSIGN(XScopedCursor);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_X_X11_UTIL_H_