gpu: Optimize and cleanup code used for CHROMIUM_copy_texture.

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index cbbbe3f17e1f041c83de4c3eed922ece3de3377c..2e27cf459550b24ceef77d08358c0d414028469b 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -10089,9 +10089,9 @@ void GLES2DecoderImpl::DoCopyTextureCHROMIUM(
     copy_texture_CHROMIUM_->DoCopyTextureWithTransform(
         this,
         source_texture->target(),
-        dest_texture->target(),
         source_texture->service_id(),
         dest_texture->service_id(), level,
+        internal_format,
         source_width, source_height,
         unpack_flip_y_,
         unpack_premultiply_alpha_,
@@ -10101,9 +10101,9 @@ void GLES2DecoderImpl::DoCopyTextureCHROMIUM(
     copy_texture_CHROMIUM_->DoCopyTexture(
         this,
         source_texture->target(),
-        dest_texture->target(),
         source_texture->service_id(),
         dest_texture->service_id(), level,
+        internal_format,
         source_width, source_height,
         unpack_flip_y_,
         unpack_premultiply_alpha_,