diff -r 000000000000 -r 6474c204b198 gfx/skia/trunk/src/core/SkBuffer.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/skia/trunk/src/core/SkBuffer.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,137 @@
+
+/*
+ * Copyright 2006 The Android Open Source Project
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+
+#include "SkBuffer.h"
+
+////////////////////////////////////////////////////////////////////////////////////////
+
+void SkRBuffer::readNoSizeCheck(void* buffer, size_t size)
+{
+    SkASSERT((fData != 0 && fStop == 0) || fPos + size <= fStop);
+    if (buffer)
+        memcpy(buffer, fPos, size);
+    fPos += size;
+}
+
+const void* SkRBuffer::skip(size_t size)
+{
+    const void* result = fPos;
+    readNoSizeCheck(NULL, size);
+    return result;
+}
+
+size_t SkRBuffer::skipToAlign4()
+{
+    size_t pos = this->pos();
+    size_t n = SkAlign4(pos) - pos;
+    fPos += n;
+    return n;
+}
+
+bool SkRBufferWithSizeCheck::read(void* buffer, size_t size) {
+    fError = fError || (fPos + size > fStop);
+    if (!fError && (size > 0)) {
+        readNoSizeCheck(buffer, size);
+    }
+    return !fError;
+}
+
+void* SkWBuffer::skip(size_t size)
+{
+    void* result = fPos;
+    writeNoSizeCheck(NULL, size);
+    return fData == NULL ? NULL : result;
+}
+
+void SkWBuffer::writeNoSizeCheck(const void* buffer, size_t size)
+{
+    SkASSERT(fData == 0 || fStop == 0 || fPos + size <= fStop);
+    if (fData && buffer)
+        memcpy(fPos, buffer, size);
+    fPos += size;
+}
+
+size_t SkWBuffer::padToAlign4()
+{
+    size_t pos = this->pos();
+    size_t n = SkAlign4(pos) - pos;
+
+    if (n && fData)
+    {
+        char* p = fPos;
+        char* stop = p + n;
+        do {
+            *p++ = 0;
+        } while (p < stop);
+    }
+    fPos += n;
+    return n;
+}
+
+#if 0
+#ifdef SK_DEBUG
+    static void AssertBuffer32(const void* buffer)
+    {
+        SkASSERT(buffer);
+        SkASSERT(((size_t)buffer & 3) == 0);
+    }
+#else
+    #define AssertBuffer32(buffer)
+#endif
+
+void* sk_buffer_write_int32(void* buffer, int32_t value)
+{
+    AssertBuffer32(buffer);
+    *(int32_t*)buffer = value;
+    return (char*)buffer + sizeof(int32_t);
+}
+
+void* sk_buffer_write_int32(void* buffer, const int32_t values[], int count)
+{
+    AssertBuffer32(buffer);
+    SkASSERT(count >= 0);
+
+    memcpy((int32_t*)buffer, values, count * sizeof(int32_t));
+    return (char*)buffer + count * sizeof(int32_t);
+}
+
+const void* sk_buffer_read_int32(const void* buffer, int32_t* value)
+{
+    AssertBuffer32(buffer);
+    if (value)
+        *value = *(const int32_t*)buffer;
+    return (const char*)buffer + sizeof(int32_t);
+}
+
+const void* sk_buffer_read_int32(const void* buffer, int32_t values[], int count)
+{
+    AssertBuffer32(buffer);
+    SkASSERT(count >= 0);
+
+    if (values)
+        memcpy(values, (const int32_t*)buffer, count * sizeof(int32_t));
+    return (const char*)buffer + count * sizeof(int32_t);
+}
+
+void* sk_buffer_write_ptr(void* buffer, void* ptr)
+{
+    AssertBuffer32(buffer);
+    *(void**)buffer = ptr;
+    return (char*)buffer + sizeof(void*);
+}
+
+const void* sk_buffer_read_ptr(const void* buffer, void** ptr)
+{
+    AssertBuffer32(buffer);
+    if (ptr)
+        *ptr = *(void**)buffer;
+    return (const char*)buffer + sizeof(void*);
+}
+
+#endif