Mozilla build fix - mozilla#1166584

firefox.spec

@@ -139,6 +139,7 @@ Patch423:        mozilla-1129873-apppicker.patch
 Patch424:        mozilla-entry-padding.patch
 Patch425:        mozilla-1192243.patch
 Patch426:        mozilla-1127752.patch
+Patch427:        mozilla-1166584.patch
 
 # Fix Skia Neon stuff on AArch64
 Patch500:        aarch64-fix-skia.patch
@@ -287,6 +288,7 @@ cd %{tarballdir}
 %patch424 -p2 -b .entry-padding
 %patch425 -p1 -b .1192243
 %patch426 -p2 -b .1127752
+%patch427 -p1 -b .1166584
 %endif
 
 %patch500 -p1

mozilla-1166584.patch

@@ -0,0 +1,27 @@
+# HG changeset patch
+# User Lee Salzman <lsalzman@mozilla.com>
+# Date 1432140511 14400
+#      Wed May 20 12:48:31 2015 -0400
+# Node ID 283e513fa1c3b2300efb359a8da1d5519c3f74f5
+# Parent  4fb7ff694bf5944b76c20b2240fb3abdc55f9a4e
+always export HelpersCairo.h
+
+diff -r 4fb7ff694bf5 -r 283e513fa1c3 gfx/2d/moz.build
+--- a/gfx/2d/moz.build	Tue May 19 11:58:45 2015 +0200
++++ b/gfx/2d/moz.build	Wed May 20 12:48:31 2015 -0400
+@@ -24,6 +24,7 @@
+     'DrawTargetTiled.h',
+     'Filters.h',
+     'Helpers.h',
++    'HelpersCairo.h',
+     'Logging.h',
+     'Matrix.h',
+     'NumericTools.h',
+@@ -79,7 +80,6 @@
+         'image_operations.cpp', # Uses _USE_MATH_DEFINES
+     ]
+     EXPORTS.mozilla.gfx += [
+-        'HelpersCairo.h',
+         'HelpersSkia.h',
+     ]
+