cc: zero/one-copy based on shared memory on IOS uses GL_TEXTURE_2D, not GL_TEXTURE_RECTANGLE_ARB.

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index ea30d8517395eed55d388bf2db0c7048ea3c3353..d572f0526c90d87e1d4c2d929c257d61cb90edae 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -2018,14 +2018,20 @@ void LayerTreeHostImpl::CreateResourceAndRasterWorkerPool(
 
   if (GetRendererCapabilities().using_image) {
     unsigned image_target = GL_TEXTURE_2D;
-#if defined(OS_MACOSX)
-    // GL_TEXTURE_RECTANGLE_ARB target is required by IOSurface backed images.
-    DCHECK(context_provider->ContextCapabilities().gpu.texture_rectangle);
-    image_target = GL_TEXTURE_RECTANGLE_ARB;
-#endif
     if (settings_.use_image_external) {
       DCHECK(context_provider->ContextCapabilities().gpu.egl_image_external);
       image_target = GL_TEXTURE_EXTERNAL_OES;
+#ifndef OS_ANDROID
+      NOTREACHED();
+#endif
+    }
+    if (settings_.use_image_io_surface) {
+      // GL_TEXTURE_RECTANGLE_ARB target is required by IOSurface backed images.
+      DCHECK(context_provider->ContextCapabilities().gpu.texture_rectangle);
+      image_target = GL_TEXTURE_RECTANGLE_ARB;
+#ifndef OS_MACOSX
+      NOTREACHED();
+#endif
     }
 
     if (settings_.use_zero_copy || IsSynchronousSingleThreaded()) {