third_party: Add wayland_drm_protocol target to third_party/mesa.

third_party/mesa/README.chromium

 Name: mesa
 Version: 9.0.3
 URL: http://www.mesa3d.org/
 License: MIT and LGPL v2
 Security Critical: Yes
 
 Description:
 This directory contains a copy of the Mesa sources with minor
 modifications to work in Chromium's build infrastructure.
 
 The license file in this directory is derived from src/docs/license.html
 and src/docs/COPYING.
 
 Modifications made:
 - Added the file README.chromium (this file)
 
 - Disabled optimizations using #pragma optimize('', off) in the
   following files:
   - src/src/mesa/main/mipmap.c
   - src/src/mesa/main/pack.c
   - src/src/mesa/math/m_eval.c
   - src/src/mesa/swrast/s_texcombine.c
 
 - Checked in sources normally autogenerated during Mesa's build
   process under src/chromium_gensrc.
 
+- Checked in public headers normally autogenerated during Mesa's build
+  process under include.
+
 - Modified _mesa_add_parameter to not read from uninitialized
   memory
 
 - Added typedefs for EGLNative*Type in eglplatform.h, guarded by an
   __APPLE__ define
 
 - Modified glsl_strtod in src/glsl/strtod.c to use strtod instead of
   strtod_l on Android
 
 - Added an #include for <assert.h> at the top of
@@ skipping 21 matching lines @@
   glGetIntegerv(GL_IMPLEMENTATION_COLOR_READ_FORMAT_OES) when no
   framebuffer is bound
 
 - Merge http://cgit.freedesktop.org/mesa/mesa/commit/?id=27307a7
 
 - Merge http://cgit.freedesktop.org/mesa/mesa/commit/?id=d2458a4
 
 - Statically link libstdc++ in chromecast build
 
 - Merge http://cgit.freedesktop.org/mesa/mesa/commit/?id=5a6ec26
-  Regenerated glsl_lexer.cc using Linux 3.13.0-63 (Ubuntu 14.04), Flex 2.5.39.
+  Regenerated glsl_lexer.cc using Linux 3.13.0-63 (Ubuntu 14.04), Flex 2.5.39.