Revert of RELAND: ShapeDetection: use mojom::Bitmap for mojo interface.

services/shape_detection/detection_utils_mac.mm

Index: services/shape_detection/detection_utils_mac.mm
diff --git a/services/shape_detection/detection_utils_mac.mm b/services/shape_detection/detection_utils_mac.mm
index 554cd7e5c804f984ae22d38609e3149146a14d40..4e87812e99854b24dd7251094ea93cb405a134ac 100644
--- a/services/shape_detection/detection_utils_mac.mm
+++ b/services/shape_detection/detection_utils_mac.mm
@@ -9,31 +9,61 @@
 #include "base/memory/shared_memory.h"
 #include "mojo/public/cpp/system/platform_handle.h"
 #include "services/shape_detection/barcode_detection_impl.h"
-#include "skia/ext/skia_utils_mac.h"
-#include "third_party/skia/include/utils/mac/SkCGUtils.h"
 
 namespace shape_detection {
 
-base::scoped_nsobject<CIImage> CreateCIImageFromSkBitmap(
-    const SkBitmap& bitmap) {
+// These formats are available but not public until Mac 10.11.
+#if !defined(MAC_OS_X_VERSION_10_11) || \
+    MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_11
+const int kCIFormatRGBA8 = 24;
+#else
+//static_assert(kCIFormatRGBA8 == 24, "RGBA8 format enum index.");
+#endif
+
+base::scoped_nsobject<CIImage> CreateCIImageFromSharedMemory(
+    mojo::ScopedSharedBufferHandle frame_data,
+    uint32_t width,
+    uint32_t height) {
   base::CheckedNumeric<uint32_t> num_pixels =
-      base::CheckedNumeric<uint32_t>(bitmap.width()) * bitmap.height();
+      base::CheckedNumeric<uint32_t>(width) * height;
   base::CheckedNumeric<uint32_t> num_bytes = num_pixels * 4;
   if (!num_bytes.IsValid()) {
     DLOG(ERROR) << "Data overflow";
     return base::scoped_nsobject<CIImage>();
   }
 
-  // First convert SkBitmap to CGImageRef.
-  base::ScopedCFTypeRef<CGImageRef> cg_image(
-      SkCreateCGImageRefWithColorspace(bitmap, NULL));
-  if (!cg_image) {
-    DLOG(ERROR) << "Failed to create CGImageRef";
+  base::SharedMemoryHandle memory_handle;
+  size_t memory_size = 0;
+  bool read_only_flag = false;
+  const MojoResult result = mojo::UnwrapSharedMemoryHandle(
+      std::move(frame_data), &memory_handle, &memory_size, &read_only_flag);
+  DCHECK_EQ(MOJO_RESULT_OK, result) << "Failed to unwrap SharedBufferHandle";
+  if (!memory_size || memory_size != num_bytes.ValueOrDie()) {
+    DLOG(ERROR) << "Invalid image size";
     return base::scoped_nsobject<CIImage>();
   }
 
-  base::scoped_nsobject<CIImage> ci_image(
-      [[CIImage alloc] initWithCGImage:cg_image]);
+  auto shared_memory =
+      base::MakeUnique<base::SharedMemory>(memory_handle, true /* read_only */);
+  if (!shared_memory->Map(memory_size)) {
+    DLOG(ERROR) << "Failed to map bytes from shared memory";
+    return base::scoped_nsobject<CIImage>();
+  }
+
+  NSData* byte_data = [NSData dataWithBytesNoCopy:shared_memory->memory()
+                                           length:num_bytes.ValueOrDie()
+                                     freeWhenDone:NO];
+
+  base::ScopedCFTypeRef<CGColorSpaceRef> colorspace(
+      CGColorSpaceCreateWithName(kCGColorSpaceSRGB));
+
+  // CIImage will return nil if RGBA8 is not supported in a certain version.
+  base::scoped_nsobject<CIImage> ci_image([[CIImage alloc]
+      initWithBitmapData:byte_data
+             bytesPerRow:width * 4
+                    size:CGSizeMake(width, height)
+                  format:kCIFormatRGBA8
+              colorSpace:colorspace]);
   if (!ci_image) {
     DLOG(ERROR) << "Failed to create CIImage";
     return base::scoped_nsobject<CIImage>();