diff -up chromium-57.0.2987.133/third_party/swiftshader/third_party/PowerVR_SDK/Builds/Include/GLES2/gl2.h.bak chromium-57.0.2987.133/third_party/swiftshader/third_party/PowerVR_SDK/Builds/Include/GLES2/gl2.h
--- chromium-57.0.2987.133/third_party/swiftshader/third_party/PowerVR_SDK/Builds/Include/GLES2/gl2.h.bak	2017-03-30 01:41:24.000000000 +0200
+++ chromium-57.0.2987.133/third_party/swiftshader/third_party/PowerVR_SDK/Builds/Include/GLES2/gl2.h	2017-04-04 22:56:27.152157107 +0200
@@ -35,8 +35,8 @@ typedef khronos_float_t  GLclampf;
 typedef khronos_int32_t  GLfixed;
 
 /* GL types for handling large vertex buffer objects */
-typedef khronos_intptr_t GLintptr;
-typedef khronos_ssize_t  GLsizeiptr;
+typedef ptrdiff_t GLintptr;
+typedef ptrdiff_t  GLsizeiptr;
 
 /* OpenGL ES core versions */
 #define GL_ES_VERSION_2_0                 1
diff -up chromium-57.0.2987.133/third_party/swiftshader/third_party/PowerVR_SDK/Builds/Include/GLES3/gl3.h.bak chromium-57.0.2987.133/third_party/swiftshader/third_party/PowerVR_SDK/Builds/Include/GLES3/gl3.h
--- chromium-57.0.2987.133/third_party/swiftshader/third_party/PowerVR_SDK/Builds/Include/GLES3/gl3.h.bak	2017-03-30 01:41:24.000000000 +0200
+++ chromium-57.0.2987.133/third_party/swiftshader/third_party/PowerVR_SDK/Builds/Include/GLES3/gl3.h	2017-04-04 22:56:38.518970309 +0200
@@ -55,8 +55,8 @@ typedef unsigned int     GLuint;
 typedef khronos_float_t  GLfloat;
 typedef khronos_float_t  GLclampf;
 typedef khronos_int32_t  GLfixed;
-typedef khronos_intptr_t GLintptr;
-typedef khronos_ssize_t  GLsizeiptr;
+typedef ptrdiff_t GLintptr;
+typedef ptrdiff_t  GLsizeiptr;
 
 /* OpenGL ES 3.0 */
 
diff -up chromium-57.0.2987.133/third_party/swiftshader/third_party/PowerVR_SDK/Builds/Include/GLES/gl.h.bak chromium-57.0.2987.133/third_party/swiftshader/third_party/PowerVR_SDK/Builds/Include/GLES/gl.h
--- chromium-57.0.2987.133/third_party/swiftshader/third_party/PowerVR_SDK/Builds/Include/GLES/gl.h.bak	2017-03-30 01:41:24.000000000 +0200
+++ chromium-57.0.2987.133/third_party/swiftshader/third_party/PowerVR_SDK/Builds/Include/GLES/gl.h	2017-04-04 22:56:31.591084171 +0200
@@ -31,8 +31,8 @@ typedef khronos_float_t  GLclampf;
 typedef khronos_int32_t  GLfixed;
 typedef khronos_int32_t  GLclampx;
 
-typedef khronos_intptr_t GLintptr;
-typedef khronos_ssize_t  GLsizeiptr;
+typedef ptrdiff_t GLintptr;
+typedef ptrdiff_t  GLsizeiptr;
 
 
 /*************************************************************/