Add validation to gl[Bind|Release]TexImage2DCHROMIUM.

gpu/command_buffer/service/gles2_cmd_decoder_passthrough_doers.cc

 // Copyright (c) 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder_passthrough.h"
 
 #include "base/strings/string_number_conversions.h"
 
 namespace gpu {
 namespace gles2 {
@@ skipping 2883 matching lines @@
     GLint location,
     const char* name) {
   glBindUniformLocationCHROMIUM(GetProgramServiceID(program, resources_),
                                 location, name);
   return error::kNoError;
 }
 
 error::Error GLES2DecoderPassthroughImpl::DoBindTexImage2DCHROMIUM(
     GLenum target,
     GLint imageId) {
-  // TODO(geofflang): error handling
+  if (target != GL_TEXTURE_2D) {
+    InsertError(GL_INVALID_ENUM, "Invalid target");
+    return error::kNoError;
+  }
+
   gl::GLImage* image = image_manager_->LookupImage(imageId);
+  if (image == nullptr) {
+    InsertError(GL_INVALID_OPERATION, "No image found with the given ID");
+    return error::kNoError;
+  }
+
   if (!image->BindTexImage(target)) {
     image->CopyTexImage(target);
   }
+
   return error::kNoError;
 }
 
 error::Error GLES2DecoderPassthroughImpl::DoReleaseTexImage2DCHROMIUM(
     GLenum target,
     GLint imageId) {
-  // TODO(geofflang): error handling
+  if (target != GL_TEXTURE_2D) {
+    InsertError(GL_INVALID_ENUM, "Invalid target");
+    return error::kNoError;
+  }
+
   gl::GLImage* image = image_manager_->LookupImage(imageId);
+  if (image == nullptr) {
+    InsertError(GL_INVALID_OPERATION, "No image found with the given ID");
+    return error::kNoError;
+  }
+
   image->ReleaseTexImage(target);
   return error::kNoError;
 }
 
 error::Error GLES2DecoderPassthroughImpl::DoTraceBeginCHROMIUM(
     const char* category_name,
     const char* trace_name) {
   NOTIMPLEMENTED();
   return error::kNoError;
 }
@@ skipping 395 matching lines @@
     GLuint texture,
     GLboolean promotion_hint,
     GLint display_x,
     GLint display_y) {
   NOTIMPLEMENTED();
   return error::kNoError;
 }
 
 }  // namespace gles2
 }  // namespace gpu