gpu: Use a rectangle to keep track of the cleared area of each texture level.

gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.cc

 // Copyright (c) 2012 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_unittest_base.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 653 matching lines @@
       GLenum target,
       GLint level,
       GLenum internal_format,
       GLenum format,
       GLenum type,
       GLsizei width,
       GLsizei height) {
   EXPECT_CALL(*gl_, BindTexture(bind_target, service_id))
       .Times(1)
       .RetiresOnSaturation();
-  EXPECT_CALL(*gl_, TexImage2D(
-      target, level, internal_format, width, height, 0, format, type, _))
+  EXPECT_CALL(
+      *gl_, TexSubImage2D(target, level, 0, 0, width, height, format, type, _))
       .Times(1)
       .RetiresOnSaturation();
   EXPECT_CALL(*gl_, BindTexture(bind_target, old_service_id))
       .Times(1)
       .RetiresOnSaturation();
 }
 
 void GLES2DecoderTestBase::SetupExpectationsForFramebufferClearing(
     GLenum target,
     GLuint clear_bits,
@@ skipping 1129 matching lines @@
   SetupDefaultProgram();
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/service/gles2_cmd_decoder_unittest_0_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu