Revert "Update libpng from 1.6.22 -> 1.6.34"chromium/3543

This reverts commit 6b2e2f0ec7c5f629c5270d14c2339197af7392d8.

Reason for revert: Broke Chromium integration.

Original change's description:
> Update libpng from 1.6.22 -> 1.6.34
> 
> Updates third_party/libpng16 to Chromium's third_party/libpng @
> e87a02987101e2dbe319a4aba6b52470f7624b4a and applies PDFium specific
> patches.
> 
> BUG=chromium:880322
> 
> Change-Id: I6724f55099c70a79da6d6e4863b9c6c9157ec571
> Reviewed-on: https://pdfium-review.googlesource.com/41910
> Reviewed-by: Lei Zhang <thestig@chromium.org>
> Commit-Queue: Ryan Harrison <rharrison@chromium.org>

TBR=thestig@chromium.org,rharrison@chromium.org

Change-Id: I2fd1f78e5d07ca983b2430bf078544185292ee1d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:880322
Reviewed-on: https://pdfium-review.googlesource.com/41970
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

1 files changed, 11 insertions, 11 deletions

diff --git a/third_party/libpng16/pngmem.c b/third_party/libpng16/pngmem.c
index 0a2f685e4f..cf815a6f88 100644
--- a/third_party/libpng16/pngmem.c
+++ b/third_party/libpng16/pngmem.c
@@ -1,8 +1,8 @@
 
 /* pngmem.c - stub functions for memory allocation
  *
- * Last changed in libpng 1.6.26 [October 20, 2016]
- * Copyright (c) 1998-2002,2004,2006-2014,2016 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.15 [November 20, 2014]
+ * Copyright (c) 1998-2002,2004,2006-2014 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
@@ -69,7 +69,7 @@ png_calloc,(png_const_structrp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
  */
 PNG_FUNCTION(png_voidp /* PRIVATE */,
 png_malloc_base,(png_const_structrp png_ptr, png_alloc_size_t size),
-    PNG_ALLOCATED)
+   PNG_ALLOCATED)
 {
    /* Moved to png_malloc_base from png_malloc_default in 1.6.0; the DOS
     * allocators have also been removed in 1.6.0, so any 16-bit system now has
@@ -110,9 +110,9 @@ png_malloc_base,(png_const_structrp png_ptr, png_alloc_size_t size),
  */
 static png_voidp
 png_malloc_array_checked(png_const_structrp png_ptr, int nelements,
-    size_t element_size)
+   size_t element_size)
 {
-   png_alloc_size_t req = (png_alloc_size_t)nelements; /* known to be > 0 */
+   png_alloc_size_t req = nelements; /* known to be > 0 */
 
    if (req <= PNG_SIZE_MAX/element_size)
       return png_malloc_base(png_ptr, req * element_size);
@@ -123,7 +123,7 @@ png_malloc_array_checked(png_const_structrp png_ptr, int nelements,
 
 PNG_FUNCTION(png_voidp /* PRIVATE */,
 png_malloc_array,(png_const_structrp png_ptr, int nelements,
-    size_t element_size),PNG_ALLOCATED)
+   size_t element_size),PNG_ALLOCATED)
 {
    if (nelements <= 0 || element_size == 0)
       png_error(png_ptr, "internal error: array alloc");
@@ -133,7 +133,7 @@ png_malloc_array,(png_const_structrp png_ptr, int nelements,
 
 PNG_FUNCTION(png_voidp /* PRIVATE */,
 png_realloc_array,(png_const_structrp png_ptr, png_const_voidp old_array,
-    int old_elements, int add_elements, size_t element_size),PNG_ALLOCATED)
+   int old_elements, int add_elements, size_t element_size),PNG_ALLOCATED)
 {
    /* These are internal errors: */
    if (add_elements <= 0 || element_size == 0 || old_elements < 0 ||
@@ -146,7 +146,7 @@ png_realloc_array,(png_const_structrp png_ptr, png_const_voidp old_array,
    if (add_elements <= INT_MAX - old_elements)
    {
       png_voidp new_array = png_malloc_array_checked(png_ptr,
-          old_elements+add_elements, element_size);
+         old_elements+add_elements, element_size);
 
       if (new_array != NULL)
       {
@@ -157,7 +157,7 @@ png_realloc_array,(png_const_structrp png_ptr, png_const_voidp old_array,
             memcpy(new_array, old_array, element_size*(unsigned)old_elements);
 
          memset((char*)new_array + element_size*(unsigned)old_elements, 0,
-             element_size*(unsigned)add_elements);
+            element_size*(unsigned)add_elements);
 
          return new_array;
       }
@@ -190,7 +190,7 @@ png_malloc,(png_const_structrp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
 #ifdef PNG_USER_MEM_SUPPORTED
 PNG_FUNCTION(png_voidp,PNGAPI
 png_malloc_default,(png_const_structrp png_ptr, png_alloc_size_t size),
-    PNG_ALLOCATED PNG_DEPRECATED)
+   PNG_ALLOCATED PNG_DEPRECATED)
 {
    png_voidp ret;
 
@@ -213,7 +213,7 @@ png_malloc_default,(png_const_structrp png_ptr, png_alloc_size_t size),
  */
 PNG_FUNCTION(png_voidp,PNGAPI
 png_malloc_warn,(png_const_structrp png_ptr, png_alloc_size_t size),
-    PNG_ALLOCATED)
+   PNG_ALLOCATED)
 {
    if (png_ptr != NULL)
    {