Reorganize Multiprocess and implement for Windows

snapshot/mac/mach_o_image_annotations_reader_test.cc

Index: snapshot/mac/mach_o_image_annotations_reader_test.cc
diff --git a/snapshot/mac/mach_o_image_annotations_reader_test.cc b/snapshot/mac/mach_o_image_annotations_reader_test.cc
index 01ecc7a06b0db412b9c7158d72496fbef449f75b..1978d38632c212fc512e1e6e6977df4179d52ec0 100644
--- a/snapshot/mac/mach_o_image_annotations_reader_test.cc
+++ b/snapshot/mac/mach_o_image_annotations_reader_test.cc
@@ -193,7 +193,7 @@ class TestMachOImageAnnotationsReader final
     // Wait for the child process to indicate that it’s done setting up its
     // annotations via the CrashpadInfo interface.
     char c;
-    CheckedReadFile(ReadPipeFD(), &c, sizeof(c));
+    CheckedReadFile(ReadPipeHandle(), &c, sizeof(c));
 
     // Verify the “simple map” annotations set via the CrashpadInfo interface.
     const std::vector<ProcessReader::Module>& modules =
@@ -216,7 +216,7 @@ class TestMachOImageAnnotationsReader final
     EXPECT_EQ("", all_annotations_simple_map["#TEST# empty_value"]);
 
     // Tell the child process that it’s permitted to crash.
-    CheckedWriteFile(WritePipeFD(), &c, sizeof(c));
+    CheckedWriteFile(WritePipeHandle(), &c, sizeof(c));
 
     if (test_type_ != kDontCrash) {
       // Handle the child’s crash. Further validation will be done in
@@ -268,10 +268,10 @@ class TestMachOImageAnnotationsReader final
 
     // Tell the parent that the environment has been set up.
     char c = '\0';
-    CheckedWriteFile(WritePipeFD(), &c, sizeof(c));
+    CheckedWriteFile(WritePipeHandle(), &c, sizeof(c));
 
     // Wait for the parent to indicate that it’s safe to crash.
-    CheckedReadFile(ReadPipeFD(), &c, sizeof(c));
+    CheckedReadFile(ReadPipeHandle(), &c, sizeof(c));
 
     // Direct an exception message to the exception server running in the
     // parent.