roll clang 161353:161757

Also suppress two warnings in third_party targets.

gyp changes reviewed by willchan in
http://codereview.chromium.org/10832369/

BUG=141532,138571
TBR=hans,willchan

Review URL: https://chromiumcodereview.appspot.com/10827405

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@152187 0039d316-1c4b-4281-b951-d872f2087c98

base/allocator/allocator.gyp

@@ -436,6 +436,11 @@
           # Disable the heap checker in tcmalloc.
           'defines': [
             'NO_HEAP_CHECK',
+           ],
+        }],
+        [ 'clang==1', {
+          'cflags': [
+            '-Wno-non-literal-null-conversion',
           ],
         }],
       ],

third_party/libxml/libxml.gyp

@@ -247,6 +247,9 @@
               'cflags': [
                 '-Wno-pointer-sign',
                 '-Wno-empty-body',
+
+                # See http://crbug.com/138571#c8
+                '-Wno-ignored-attributes',
               ],
             }],
           ],

tools/clang/scripts/update.sh

@@ -8,7 +8,7 @@
 # Do NOT CHANGE this if you don't know what you're doing -- see
 # https://code.google.com/p/chromium/wiki/UpdatingClang
 # Reverting problematic clang rolls is safe, though.
-CLANG_REVISION=161353
+CLANG_REVISION=161757
 
 THIS_DIR="$(dirname "${0}")"
 LLVM_DIR="${THIS_DIR}/../../../third_party/llvm"