blimp: Hook up the layer holding the tab content into Chrome.

chrome/browser/android/tab_android.cc

Index: chrome/browser/android/tab_android.cc
diff --git a/chrome/browser/android/tab_android.cc b/chrome/browser/android/tab_android.cc
index 63cbe9f53e5679bef3c7a9846e7ef3c0b89e8e5a..4a6ca889594f888cf9d59923da980ee9a9d6affd 100644
--- a/chrome/browser/android/tab_android.cc
+++ b/chrome/browser/android/tab_android.cc
@@ -430,6 +430,10 @@ base::android::ScopedJavaLocalRef<jobject> TabAndroid::InitBlimpContents(
   DCHECK(context);
   blimp_contents_ = context->CreateBlimpContents();
   DCHECK(blimp_contents_);
+
+  // Attach the layer holding the tab contents to the |content_layer_|.
+  content_layer_->InsertChild(blimp_contents_->GetNativeView()->GetLayer(), 0);
+
   return blimp_contents_->GetJavaObject();
 }