mac: Make gfx_unittests and skia_unittests build with the 10.11 SDK.

ui/gfx/range/range_mac_unittest.mm

Index: ui/gfx/range/range_mac_unittest.mm
diff --git a/ui/gfx/range/range_mac_unittest.mm b/ui/gfx/range/range_mac_unittest.mm
index c04cbfe9503a93db2387fa2d050a2e8bfe4bcae8..85323f27ce88c60aa4b949994c407643394bf6cd 100644
--- a/ui/gfx/range/range_mac_unittest.mm
+++ b/ui/gfx/range/range_mac_unittest.mm
@@ -38,6 +38,6 @@ TEST(RangeTest, FromNSRangeInvalid) {
 TEST(RangeTest, ToNSRangeInvalid) {
   gfx::Range r(gfx::Range::InvalidRange());
   NSRange nsr = r.ToNSRange();
-  EXPECT_EQ(NSNotFound, nsr.location);
+  EXPECT_EQ(static_cast<NSUInteger>(NSNotFound), nsr.location);

[Nico, 2015/10/09 17:42:04]

Here, the signedness of NSNotFound apparently changed? (it's a regular enum now)

[Robert Sesek, 2015/10/09 18:19:13]

That's really weird. NSNotFound = NSIntegerMax but NSRange has to NSUIntegers.

   EXPECT_EQ(0U, nsr.length);
 }