CompressedCopyTextureCHROMIUM: validate texture targets before looking up levels

gpu/command_buffer/tests/gl_compressed_copy_texture_CHROMIUM_unittest.cc

 // Copyright (c) 2015 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.
 
 #ifndef GL_GLEXT_PROTOTYPES
 #define GL_GLEXT_PROTOTYPES
 #endif
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
@@ skipping 257 matching lines @@
   glCompressedCopyTextureCHROMIUM(99994, textures_[1]);
   EXPECT_TRUE(glGetError() == GL_INVALID_VALUE);
 
   glCompressedCopyTextureCHROMIUM(99995, 99996);
   EXPECT_TRUE(glGetError() == GL_INVALID_VALUE);
 
   glCompressedCopyTextureCHROMIUM(textures_[0], textures_[1]);
   EXPECT_TRUE(glGetError() == GL_NO_ERROR);
 }
 
+TEST_F(GLCompressedCopyTextureCHROMIUMTest, InvalidTextureTarget) {
+  glBindTexture(GL_TEXTURE_CUBE_MAP, textures_[0]);
+  glBindTexture(GL_TEXTURE_CUBE_MAP, textures_[1]);
+  glCompressedCopyTextureCHROMIUM(textures_[0], textures_[1]);
+  EXPECT_TRUE(glGetError() == GL_INVALID_VALUE);
+}
+
 // Validate that some basic GL state is not touched upon execution of
 // the extension.
 TEST_F(GLCompressedCopyTextureCHROMIUMTest, BasicStatePreservation) {
   if (!GLTestHelper::HasExtension("GL_EXT_texture_compression_dxt1")) {
     LOG(INFO) <<
         "GL_EXT_texture_compression_dxt1 not supported. Skipping test...";
     return;
   }
 
   glBindTexture(GL_TEXTURE_2D, textures_[0]);
@@ skipping 103 matching lines @@
   glGetIntegerv(GL_TEXTURE_BINDING_2D, &bound_texture);
   EXPECT_EQ(texture_ids[0], static_cast<GLuint>(bound_texture));
   glBindTexture(GL_TEXTURE_2D, 0);
 
   glDeleteTextures(2, texture_ids);
 
   EXPECT_TRUE(GL_NO_ERROR == glGetError());
 }
 
 }  // namespace gpu