Use mojo typemaps to simplify arc::IntentFilter::IntentFilter()

components/arc/intent_helper/intent_filter_unittest.cc

Index: components/arc/intent_helper/intent_filter_unittest.cc
diff --git a/components/arc/intent_helper/intent_filter_unittest.cc b/components/arc/intent_helper/intent_filter_unittest.cc
index 1e0113f1a8e97fef941585fda871d86ceaa25b4d..1205c2e529ccc0f812673ad478a5d0ecd65c8da9 100644
--- a/components/arc/intent_helper/intent_filter_unittest.cc
+++ b/components/arc/intent_helper/intent_filter_unittest.cc
@@ -20,41 +20,32 @@ namespace {
 
 class IntentFilterBuilder {
  public:
-  IntentFilterBuilder():
-      filter_spec_(mojom::IntentFilter::New()) {
-  }
+  IntentFilterBuilder() = default;
 
   IntentFilterBuilder& authority(const std::string& host) {
     return authority(host, -1);
   }
 
   IntentFilterBuilder& authority(const std::string& host, int port) {
-    mojom::AuthorityEntryPtr ae = mojom::AuthorityEntry::New();
-    ae->host = host;
-    ae->port = port;
-    if (!filter_spec_->data_authorities.has_value())
-      filter_spec_->data_authorities = std::vector<mojom::AuthorityEntryPtr>();
-    filter_spec_->data_authorities->push_back(std::move(ae));
+    authorities_.emplace_back(host, port);
     return *this;
   }
 
   IntentFilterBuilder& path(const std::string& path,
                             const mojom::PatternType& type) {
-    mojom::PatternMatcherPtr p = mojom::PatternMatcher::New();
-    p->pattern = path;
-    p->type = type;
-    if (!filter_spec_->data_paths.has_value())
-      filter_spec_->data_paths = std::vector<mojom::PatternMatcherPtr>();
-    filter_spec_->data_paths->push_back(std::move(p));
+    paths_.emplace_back(path, type);
     return *this;
   }
 
-  operator IntentFilter() const {
-    return std::move(IntentFilter(filter_spec_));
+  operator IntentFilter() {
+    return IntentFilter(std::move(authorities_), std::move(paths_));
   }
 
  private:
-  mojom::IntentFilterPtr filter_spec_;
+  std::vector<IntentFilter::AuthorityEntry> authorities_;
+  std::vector<IntentFilter::PatternMatcher> paths_;
+
+  DISALLOW_COPY_AND_ASSIGN(IntentFilterBuilder);
 };
 
 }  // namespace