Convert UMA interface to IDL.

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
new file mode 100644
index 0000000000000000000000000000000000000000..cdb39080fa2e8629ae06b438d555956cd8d0934d
--- /dev/null
+++ b/ppapi/api/private/ppb_uma_private.idl
@@ -0,0 +1,48 @@
+/* Copyright (c) 2012 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/**
+ * This file defines the <code>PPB_UMA_Private</code> interface.
+ */
+label Chrome {
+  M18 = 0.1
+};
+
+/**
+ * Contains functions for plugins to report UMA usage stats.
+ */
+interface PPB_UMA_Private {
+  /**
+   * HistogramCustomTimes is a pointer to a function which records a time
+   * 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,
+                            [in] int64_t sample,
+                            [in] int64_t min,
+                            [in] int64_t max,
+                            [in] uint32_t bucket_count);
+
+  /**
+   * HistogramCustomCounts is a pointer to a function which records a sample
+   * in the histogram given by |name|, possibly creating the histogram if it
+   * does not exist.
+   */
+  void HistogramCustomCounts([in] PP_Var name,
+                             [in] int32_t sample,
+                             [in] int32_t min,
+                             [in] int32_t max,
+                             [in] uint32_t bucket_count);
+
+  /**
+   * HistogramEnumeration is a pointer to a function which records a sample
+   * in the histogram given by |name|, possibly creating the histogram if it
+   * 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,
+                            [in] int32_t sample,
+                            [in] int32_t boundary_value);
+};