Android: Don't destroy LayerTreeHost when Surface goes away

ui/android/resources/resource_manager_impl.h

Index: ui/android/resources/resource_manager_impl.h
diff --git a/ui/android/resources/resource_manager_impl.h b/ui/android/resources/resource_manager_impl.h
index 9f3388d520ea3415237e0b61010b03def2797dc3..6e74ca58e45af8365ae641bc5aff853c0f85ec5c 100644
--- a/ui/android/resources/resource_manager_impl.h
+++ b/ui/android/resources/resource_manager_impl.h
@@ -16,9 +16,11 @@ class UI_ANDROID_EXPORT ResourceManagerImpl : public ResourceManager {
  public:
   static ResourceManagerImpl* FromJavaObject(jobject jobj);
 
-  explicit ResourceManagerImpl(ui::UIResourceProvider* ui_resource_provider);
+  ResourceManagerImpl();
   ~ResourceManagerImpl() override;
 
+  void Init(cc::LayerTreeHost* host);
+
   // ResourceManager implementation.
   base::android::ScopedJavaLocalRef<jobject> GetJavaObject() override;
   Resource* GetResource(AndroidResourceType res_type, int res_id) override;
@@ -53,7 +55,7 @@ class UI_ANDROID_EXPORT ResourceManagerImpl : public ResourceManager {
 
   typedef IDMap<Resource, IDMapOwnPointer> ResourceMap;
 
-  ui::UIResourceProvider* const ui_resource_provider_;
+  cc::LayerTreeHost* host_;
   ResourceMap resources_[ANDROID_RESOURCE_TYPE_COUNT];
 
   base::android::ScopedJavaGlobalRef<jobject> java_obj_;