Move HiDPI-related Pepper interfaces to stable

ppapi/cpp/view.cc

Index: ppapi/cpp/view.cc
diff --git a/ppapi/cpp/view.cc b/ppapi/cpp/view.cc
index 68c6e311f20d957b51460acff4dfab0efe677d51..00035c6970b549924937e47360ff23096df4d55a 100644
--- a/ppapi/cpp/view.cc
+++ b/ppapi/cpp/view.cc
@@ -15,6 +15,10 @@ template <> const char* interface_name<PPB_View_1_0>() {
   return PPB_VIEW_INTERFACE_1_0;
 }
 
+template <> const char* interface_name<PPB_View_1_1>() {
+  return PPB_VIEW_INTERFACE_1_1;
+}
+
 }  // namespace
 
 View::View() : Resource() {
@@ -60,4 +64,16 @@ Rect View::GetClipRect() const {
   return Rect();
 }
 
+float View::GetDeviceScale() const {
+  if (!has_interface<PPB_View_1_1>())
+    return 1.0f;
+  return get_interface<PPB_View_1_1>()->GetDeviceScale(pp_resource());
+}
+
+float View::GetCSSScale() const {
+  if (!has_interface<PPB_View_1_1>())
+    return 1.0f;
+  return get_interface<PPB_View_1_1>()->GetCSSScale(pp_resource());
+}
+
 }  // namespace pp