Proxy private UMA pepper interface for out-of-process and NaCl plugins.

ppapi/api/private/ppb_uma_private.idl

Index: ppapi/api/private/ppb_uma_private.idl
diff --git a/ppapi/api/private/ppb_uma_private.idl b/ppapi/api/private/ppb_uma_private.idl
index cdb39080fa2e8629ae06b438d555956cd8d0934d..a115ceeb176027e8bb8057a0c32a7cc146e3f9d1 100644
--- a/ppapi/api/private/ppb_uma_private.idl
+++ b/ppapi/api/private/ppb_uma_private.idl
@@ -6,8 +6,11 @@
 /**
  * This file defines the <code>PPB_UMA_Private</code> interface.
  */
+
+[generate_thunk,thunk_include="ppapi/thunk/ppb_uma_singleton_api.h"]
+
 label Chrome {
-  M18 = 0.1
+  M33 = 0.2
 };
 
 /**
@@ -19,7 +22,9 @@ interface PPB_UMA_Private {
    * sample given in milliseconds in the histogram given by |name|, possibly
    * creating the histogram if it does not exist.
    */
-  void HistogramCustomTimes([in] PP_Var name,
+  [singleton,api=PPB_UMA_Singleton_API]
+  void HistogramCustomTimes([in] PP_Instance instance,
+                            [in] PP_Var name,
                             [in] int64_t sample,
                             [in] int64_t min,
                             [in] int64_t max,
@@ -30,7 +35,9 @@ interface PPB_UMA_Private {
    * in the histogram given by |name|, possibly creating the histogram if it
    * does not exist.
    */
-  void HistogramCustomCounts([in] PP_Var name,
+  [singleton,api=PPB_UMA_Singleton_API]
+  void HistogramCustomCounts([in] PP_Instance instance,
+                             [in] PP_Var name,
                              [in] int32_t sample,
                              [in] int32_t min,
                              [in] int32_t max,
@@ -42,7 +49,9 @@ interface PPB_UMA_Private {
    * does not exist.  The sample represents a value in an enumeration bounded
    * by |boundary_value|, that is, sample < boundary_value always.
    */
-  void HistogramEnumeration([in] PP_Var name,
+  [singleton,api=PPB_UMA_Singleton_API]
+  void HistogramEnumeration([in] PP_Instance instance,
+                            [in] PP_Var name,
                             [in] int32_t sample,
                             [in] int32_t boundary_value);
 };