Create snapshot/mac and move some files from snapshot and util to there

snapshot/mac/mach_o_image_reader.h

Index: snapshot/mac/mach_o_image_reader.h
diff --git a/util/mac/mach_o_image_reader.h b/snapshot/mac/mach_o_image_reader.h
similarity index 98%
rename from util/mac/mach_o_image_reader.h
rename to snapshot/mac/mach_o_image_reader.h
index ad39611103b8a50ab26298df495136b7fdcaf0c9..f89e9e9406bb4751d4d1cb833654e3c694ecf857 100644
--- a/util/mac/mach_o_image_reader.h
+++ b/snapshot/mac/mach_o_image_reader.h
@@ -12,8 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifndef CRASHPAD_UTIL_MAC_MACH_O_IMAGE_READER_H_
-#define CRASHPAD_UTIL_MAC_MACH_O_IMAGE_READER_H_
+#ifndef CRASHPAD_SNAPSHOT_MAC_MACH_O_IMAGE_READER_H_
+#define CRASHPAD_SNAPSHOT_MAC_MACH_O_IMAGE_READER_H_
 
 #include <mach/mach.h>
 #include <stdint.h>
@@ -23,10 +23,10 @@
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
+#include "snapshot/mac/process_types.h"
 #include "util/misc/initialization_state_dcheck.h"
 #include "util/misc/uuid.h"
 #include "util/stdlib/pointer_container.h"
-#include "util/mac/process_types.h"
 
 namespace crashpad {
 
@@ -54,7 +54,7 @@ class MachOImageReader {
   //!     where the `mach_header` or `mach_header_64` at the beginning of the
   //!     image to be read is located. This address can be determined by reading
   //!     the remote process’ dyld information (see
-  //!     util/mac/process_types/dyld_images.proctype).
+  //!     snapshot/mac/process_types/dyld_images.proctype).
   //! \param[in] name The module’s name, a string to be used in logged messages.
   //!     This string is for diagnostic purposes only, and may be empty.
   //!
@@ -340,4 +340,4 @@ class MachOImageReader {
 
 }  // namespace crashpad
 
-#endif  // CRASHPAD_UTIL_MAC_MACH_O_IMAGE_READER_H_
+#endif  // CRASHPAD_SNAPSHOT_MAC_MACH_O_IMAGE_READER_H_