Handle pixel (un)pack buffers with non-zero offset.

gpu/command_buffer/service/gles2_cmd_decoder_passthrough_doers.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder_passthrough_doers.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_passthrough_doers.cc b/gpu/command_buffer/service/gles2_cmd_decoder_passthrough_doers.cc
index d602360c369fbf5981ce8050b6f0eeb0b74b56a8..c00d2cb52fb7be698776856d64529414c52225fa 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_passthrough_doers.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_passthrough_doers.cc
@@ -467,7 +467,10 @@ error::Error GLES2DecoderPassthroughImpl::DoCompressedTexImage2D(
     GLsizei height,
     GLint border,
     GLsizei imageSize,
+    GLsizei dataSize,

[Zhenyao Mo, 2017/04/11 19:56:54]

nit: this is actually against chromium coding style.

imageSize -> image_size, dataSize -> data_size

[Corentin Wallez, 2017/04/11 22:06:34]

Done here and in other places in this file and the header.

     const void* data) {
+  // TODO(cwallez@chromium.org): Use dataSize with the robust version of the
+  // entry point
   glCompressedTexImage2D(target, level, internalformat, width, height, border,
                          imageSize, data);
   return error::kNoError;
@@ -482,7 +485,10 @@ error::Error GLES2DecoderPassthroughImpl::DoCompressedTexSubImage2D(
     GLsizei height,
     GLenum format,
     GLsizei imageSize,
+    GLsizei dataSize,
     const void* data) {
+  // TODO(cwallez@chromium.org): Use dataSize with the robust version of the
+  // entry point
   glCompressedTexSubImage2D(target, level, xoffset, yoffset, width, height,
                             format, imageSize, data);
   return error::kNoError;
@@ -497,7 +503,10 @@ error::Error GLES2DecoderPassthroughImpl::DoCompressedTexImage3D(
     GLsizei depth,
     GLint border,
     GLsizei imageSize,
+    GLsizei dataSize,
     const void* data) {
+  // TODO(cwallez@chromium.org): Use dataSize with the robust version of the
+  // entry point
   glCompressedTexImage3D(target, level, internalformat, width, height, depth,
                          border, imageSize, data);
   return error::kNoError;
@@ -514,7 +523,10 @@ error::Error GLES2DecoderPassthroughImpl::DoCompressedTexSubImage3D(
     GLsizei depth,
     GLenum format,
     GLsizei imageSize,
+    GLsizei dataSize,
     const void* data) {
+  // TODO(cwallez@chromium.org): Use dataSize with the robust version of the
+  // entry point
   glCompressedTexSubImage3D(target, level, xoffset, yoffset, zoffset, width,
                             height, depth, format, imageSize, data);
   return error::kNoError;