Move HiDPI-related Pepper interfaces to stable

ppapi/cpp/graphics_2d.cc

Index: ppapi/cpp/graphics_2d.cc
diff --git a/ppapi/cpp/graphics_2d.cc b/ppapi/cpp/graphics_2d.cc
index f4cd6451babf5c73c4a271f09fd9edbc021eba94..0cb4ef6b284c9a178a3ea08446d2a44b73bd203e 100644
--- a/ppapi/cpp/graphics_2d.cc
+++ b/ppapi/cpp/graphics_2d.cc
@@ -22,6 +22,10 @@ template <> const char* interface_name<PPB_Graphics2D_1_0>() {
   return PPB_GRAPHICS_2D_INTERFACE_1_0;
 }
 
+template <> const char* interface_name<PPB_Graphics2D_1_1>() {
+  return PPB_GRAPHICS_2D_INTERFACE_1_1;
+}
+
 }  // namespace
 
 Graphics2D::Graphics2D() : Resource() {
@@ -104,4 +108,22 @@ int32_t Graphics2D::Flush(const CompletionCallback& cc) {
       pp_resource(), cc.pp_completion_callback());
 }
 
+// static
+bool Graphics2D::SupportsScale() {
+  return has_interface<PPB_Graphics2D_1_1>();
+}
+
+bool Graphics2D::SetScale(float scale) {
+  if (!has_interface<PPB_Graphics2D_1_1>())
+    return false;
+  return PP_ToBool(get_interface<PPB_Graphics2D_1_1>()->SetScale(pp_resource(),
+                                                                 scale));
+}
+
+float Graphics2D::GetScale() {
+  if (!has_interface<PPB_Graphics2D_1_1>())
+    return 1.0f;
+  return get_interface<PPB_Graphics2D_1_1>()->GetScale(pp_resource());
+}
+
 }  // namespace pp