Avoid unncessary EGLImageTargetTexture calls

gpu/command_buffer/service/texture_definition.cc

Index: gpu/command_buffer/service/texture_definition.cc
diff --git a/gpu/command_buffer/service/texture_definition.cc b/gpu/command_buffer/service/texture_definition.cc
index 7b38f86f3000ea82e1f31be294a84ac4f8bc9109..0c50a2217621bdd39ce5c48e8dbf249234688615 100644
--- a/gpu/command_buffer/service/texture_definition.cc
+++ b/gpu/command_buffer/service/texture_definition.cc
@@ -405,8 +405,14 @@ void TextureDefinition::UpdateTextureInternal(Texture* texture) const {
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, mag_filter_);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrap_s_);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrap_t_);
-  if (image_buffer_.get())
-    image_buffer_->BindToTexture(target_);
+
+  if (image_buffer_.get()) {
+    gfx::GLImage* existing_image = texture->GetLevelImage(target_, 0);
+    // Don't need to re-bind if already bound before.
+    if (!existing_image || !image_buffer_->IsClient(existing_image)) {
+      image_buffer_->BindToTexture(target_);
+    }
+  }
 
   if (defined_) {
     texture->face_infos_.resize(1);