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 c2b08e722741834f3e8ec84954d9708f6e05b3a3..f5d6e49fe557732dc9cacadb59c86806f9ccb5b1 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -10055,9 +10055,9 @@ 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_,
@@ -10067,9 +10067,9 @@ 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_,