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

skia/ext/skia_utils_mac_unittest.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "skia/ext/skia_utils_mac.h"
 
 #import <AppKit/AppKit.h>
 
+#include "base/mac/foundation_util.h"
 #include "base/mac/scoped_nsobject.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "ui/gfx/scoped_ns_graphics_context_save_gstate_mac.h"
 
 namespace {
 
 class SkiaUtilsMacTest : public testing::Test {
  public:
   // Creates a red or blue bitmap.
@@ skipping 163 matching lines @@
   SkBitmap thing(CreateSkBitmap(width, height, isred, tfbit));
 
   // Confirm size
   NSImage* image = gfx::SkBitmapToNSImage(thing);
   EXPECT_DOUBLE_EQ([image size].width, (double)width);
   EXPECT_DOUBLE_EQ([image size].height, (double)height);
 
   EXPECT_TRUE([[image representations] count] == 1);
   EXPECT_TRUE([[[image representations] lastObject]
       isKindOfClass:[NSBitmapImageRep class]]);
-  TestImageRep([[image representations] lastObject], isred);

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

here the compiler now realizes that the last representation is an NSImageRep
which isn't always an NSBitmapImageRep (also below)

+  TestImageRep(base::mac::ObjCCastStrict<NSBitmapImageRep>(
+                   [[image representations] lastObject]),
+               isred);
 }
 
 TEST_F(SkiaUtilsMacTest, BitmapToNSImage_RedSquare64x64) {
   ShapeHelper(64, 64, true, true);
 }
 
 TEST_F(SkiaUtilsMacTest, BitmapToNSImage_BlueRectangle199x19) {
   ShapeHelper(199, 19, false, true);
 }
 
@@ skipping 12 matching lines @@
   EXPECT_DOUBLE_EQ(height, [imageRep size].height);
   TestImageRep(imageRep, false);
 }
 
 TEST_F(SkiaUtilsMacTest, NSImageRepToSkBitmap) {
   int width = 10;
   int height = 15;
 
   NSImage* image = CreateNSImage(width, height);
   EXPECT_EQ(1u, [[image representations] count]);
-  NSBitmapImageRep* imageRep = [[image representations] lastObject];
+  NSBitmapImageRep* imageRep = base::mac::ObjCCastStrict<NSBitmapImageRep>(
+      [[image representations] lastObject]);
   NSColorSpace* colorSpace = [NSColorSpace genericRGBColorSpace];
   SkBitmap bitmap(gfx::NSImageRepToSkBitmapWithColorSpace(
       imageRep, [image size], false, [colorSpace CGColorSpace]));
   TestSkBitmap(bitmap);
 }
 
 TEST_F(SkiaUtilsMacTest, BitLocker_Identity) {
   RunBitLockerTest(SkiaUtilsMacTest::TestIdentity);
 }
 
@@ skipping 20 matching lines @@
 TEST_F(SkiaUtilsMacTest, BitLocker_ClipNoBits) {
   RunBitLockerTest(SkiaUtilsMacTest::TestClipNoBits);
 }
 
 TEST_F(SkiaUtilsMacTest, BitLocker_XClipNoBits) {
   RunBitLockerTest(SkiaUtilsMacTest::TestXClipNoBits);
 }
 
 }  // namespace