diff -r 000000000000 -r 6474c204b198 gfx/skia/trunk/include/core/SkTrace.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/skia/trunk/include/core/SkTrace.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,45 @@
+
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkTrace_DEFINED
+#define SkTrace_DEFINED
+
+#ifdef SK_USER_TRACE_INCLUDE_FILE
+
+/* If your system embeds skia and has complex event logging, in
+   src/config/SkUserConfig.h:
+     - define the three SK_TRACE_EVENT macros to map to your system's
+       equivalents,
+     - define the name of the include file in SK_USER_TRACE_INCLUDE_FILE
+   A trivial example is given in src/utils/SkDebugTrace.h.
+
+   All arguments are const char*. Skia typically passes the name of
+   the object and function (and sometimes region of interest within
+   the function) separated by double colons for 'event'.
+
+   SK_TRACE_EVENT1 and SK_TRACE_EVENT2 take one or two arbitrary
+   name-value pairs that you also want to log. SkStringPrintf() is useful
+   for formatting these values.
+
+   For example:
+    SK_TRACE_EVENT0("GrContext::createAndLockTexture");
+    SK_TRACE_EVENT1("GrDefaultPathRenderer::onDrawPath::renderPasses",
+                    "verts", SkStringPrintf("%i", vert - base).c_str());
+*/
+
+    #include SK_USER_TRACE_INCLUDE_FILE
+
+#else
+
+    #define SK_TRACE_EVENT0(event)
+    #define SK_TRACE_EVENT1(event, name1, value1)
+    #define SK_TRACE_EVENT2(event, name1, value1, name2, value2)
+
+#endif
+
+#endif