Beginning of an accessibility implementation for html_viewer.

mojo/services/html_viewer/blink_basic_type_converters.h

Index: mojo/services/html_viewer/blink_basic_type_converters.h
diff --git a/mojo/services/html_viewer/blink_basic_type_converters.h b/mojo/services/html_viewer/blink_basic_type_converters.h
index 60ddeee087c6ebea307e7ff15f17bf758442d1cf..987d0a33ecdcc0fe51a7e00948de351651edd405 100644
--- a/mojo/services/html_viewer/blink_basic_type_converters.h
+++ b/mojo/services/html_viewer/blink_basic_type_converters.h
@@ -8,9 +8,11 @@
 #include "mojo/public/cpp/bindings/type_converter.h"
 
 #include "mojo/public/cpp/bindings/array.h"
+#include "mojo/services/public/interfaces/geometry/geometry.mojom.h"
 #include "third_party/WebKit/public/platform/WebVector.h"
 
 namespace blink {
+struct WebRect;
 class WebString;
 }
 
@@ -30,6 +32,11 @@ struct TypeConverter<Array<uint8_t>, blink::WebString> {
   static Array<uint8_t> Convert(const blink::WebString& input);
 };
 
+template <>
+struct TypeConverter<RectPtr, blink::WebRect> {
+  static RectPtr Convert(const blink::WebRect& input);
+};
+
 template<typename T, typename U>
 struct TypeConverter<Array<T>, blink::WebVector<U> > {
   static Array<T> Convert(const blink::WebVector<U>& vector) {