Implement ImageBitmap interface

Implementation of ImageBitmap

ImageBitMap webidl file added

Implementation of ImageBitmap

mentioned the correct origin link

basic new and new_inherited

updated the mod.rs file to include imagebitmap

imagebitmap implemented

changed according to Serialization

implemented serializable

get methods for width and height

basic imagebitmap

added missing crates

added Vec and missing crates

Syntax fixes

Reformatting and minor error fixes

Implementation of  ImageBitmap

tidy-test runs

Took out extra parameters in reflect_dom_object call

added comments with specification links for webidl functions

changing the code based on review comments

adding resolved changes form the pull request

Changes based on pr review

Changes based on pr review

ran test-tidy and fmt

removed the duplicate crate

removed unnecessary crates

Kept only the relevant crate import

Updated test expectations, exposed interface list, and manifest

components/script/dom/imagebitmap.rs

@@ -0,0 +1,58 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use crate::dom::bindings::cell::DomRefCell;
+
+use crate::dom::bindings::codegen::Bindings::ImageBitmapBinding::ImageBitmapMethods;
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::globalscope::GlobalScope;
+
+use crate::dom::bindings::error::Fallible;
+use crate::dom::bindings::reflector::{reflect_dom_object, Reflector};
+use dom_struct::dom_struct;
+
+use std::vec::Vec;
+
+#[dom_struct]
+pub struct ImageBitmap {
+    reflector_: Reflector,
+    width: u32,
+    height: u32,
+    bitmap_data: DomRefCell<Vec<u8>>,
+}
+
+impl ImageBitmap {
+    fn new_inherited(width_arg: u32, height_arg: u32) -> ImageBitmap {
+        ImageBitmap {
+            reflector_: Reflector::new(),
+            width: width_arg,
+            height: height_arg,
+            bitmap_data: DomRefCell::new(vec![]),
+        }
+    }
+
+    #[allow(dead_code)]
+    pub fn new(global: &GlobalScope, width: u32, height: u32) -> Fallible<DomRoot<ImageBitmap>> {
+        //assigning to a variable the return object of new_inherited
+        let imagebitmap = Box::new(ImageBitmap::new_inherited(width, height));
+
+        Ok(reflect_dom_object(imagebitmap, global))
+    }
+}
+
+impl ImageBitmapMethods for ImageBitmap {
+    // https://html.spec.whatwg.org/multipage/#dom-imagebitmap-height
+    fn Height(&self) -> u32 {
+        //to do: add a condition for checking detached internal slot
+        //and return 0 if set to true
+        self.height
+    }
+
+    // https://html.spec.whatwg.org/multipage/#dom-imagebitmap-width
+    fn Width(&self) -> u32 {
+        //to do: add a condition to check detached internal slot
+        ////and return 0 if set to true
+        self.width
+    }
+}