Implement HiDPI support in Pepper dev interface

ppapi/thunk/interfaces_ppb_private.h

Index: ppapi/thunk/interfaces_ppb_private.h
diff --git a/ppapi/thunk/interfaces_ppb_private.h b/ppapi/thunk/interfaces_ppb_private.h
index d2378b4ebc07ae8570ac9f8023c34b34d79056c3..fb545eff870b13fe4e248e8d3f895cd7a100a606 100644
--- a/ppapi/thunk/interfaces_ppb_private.h
+++ b/ppapi/thunk/interfaces_ppb_private.h
@@ -32,6 +32,8 @@ PROXIED_IFACE(PPB_FileRef, PPB_FILEREFPRIVATE_INTERFACE_0_1,
 // This uses the FileIO API which is declared in the public stable file.
 PROXIED_IFACE(PPB_FileIO, PPB_FILEIOTRUSTED_INTERFACE_0_4,
               PPB_FileIOTrusted_0_4)
+PROXIED_IFACE(NoAPIName, PPB_GRAPHICS2D_PRIVATE_INTERFACE_0_1,
+              PPB_Graphics2D_Private_0_1)
 PROXIED_IFACE(PPB_HostResolver_Private, PPB_HOSTRESOLVER_PRIVATE_INTERFACE_0_1,
               PPB_HostResolver_Private_0_1)
 PROXIED_IFACE(PPB_Instance, PPB_FLASHFULLSCREEN_INTERFACE_0_1,
@@ -55,6 +57,8 @@ PROXIED_IFACE(PPB_UDPSocket_Private, PPB_UDPSOCKET_PRIVATE_INTERFACE_0_2,
               PPB_UDPSocket_Private_0_2)
 PROXIED_IFACE(PPB_UDPSocket_Private, PPB_UDPSOCKET_PRIVATE_INTERFACE_0_3,
               PPB_UDPSocket_Private_0_3)
+PROXIED_IFACE(NoAPIName, PPB_VIEW_PRIVATE_INTERFACE_0_1,
+              PPB_View_Private_0_1)
 PROXIED_IFACE(PPB_X509Certificate_Private,
               PPB_X509CERTIFICATE_PRIVATE_INTERFACE_0_1,
               PPB_X509Certificate_Private_0_1)