Roll mesa 261106:265279, remove -Wno-unknown-pragma on OS X too.

Only change in the roll: https://codereview.chromium.org/246843006/

(We used to have this change, but https://codereview.chromium.org/17005007
lost it.)

BUG=338759
[email protected]
NOTRY=true

Review URL: https://codereview.chromium.org/247673002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@265314 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/DEPS b/DEPS
index 2c8d9fa..2ac4134 100644
--- a/DEPS
+++ b/DEPS
@@ -294,7 +294,7 @@
     "/trunk/deps/cdm@262570",
 
   "src/third_party/mesa/src":
-    "/trunk/deps/third_party/mesa@261106",
+    "/trunk/deps/third_party/mesa@265279",
 
   "src/third_party/cld_2/src":
     (Var("googlecode_url") % "cld2") + "/trunk@160",