Read annotation objects from the client when producing snapshots.

This wires up the annotation objects system of the client to the
snapshot production and minidump writing facilities.

Bug: crashpad:192
Change-Id: If7bb7625b140d71a15b84729372cbd0fd4bc63ef
Reviewed-on: https://chromium-review.googlesource.com/749870
Reviewed-by: Mark Mentovai <mark@chromium.org>
Commit-Queue: Robert Sesek <rsesek@chromium.org>

snapshot/mac/module_snapshot_mac.cc

@@ -187,7 +187,9 @@ std::map<std::string, std::string> ModuleSnapshotMac::AnnotationsSimpleMap()
 
 std::vector<AnnotationSnapshot> ModuleSnapshotMac::AnnotationObjects() const {
   INITIALIZATION_STATE_DCHECK_VALID(initialized_);
-  return {};
+  MachOImageAnnotationsReader annotations_reader(
+      process_reader_, mach_o_image_reader_, name_);
+  return annotations_reader.AnnotationsList();
 }
 
 std::set<CheckedRange<uint64_t>> ModuleSnapshotMac::ExtraMemoryRanges() const {

snapshot/win/module_snapshot_win.cc

@@ -192,7 +192,9 @@ std::map<std::string, std::string> ModuleSnapshotWin::AnnotationsSimpleMap()
 
 std::vector<AnnotationSnapshot> ModuleSnapshotWin::AnnotationObjects() const {
   INITIALIZATION_STATE_DCHECK_VALID(initialized_);
-  return {};
+  PEImageAnnotationsReader annotations_reader(
+      process_reader_, pe_image_reader_.get(), name_);
+  return annotations_reader.AnnotationsList();
 }
 
 std::set<CheckedRange<uint64_t>> ModuleSnapshotWin::ExtraMemoryRanges() const {