Added WebContents.getPreferredSize()

Author: martin-world1977

docs/api/web-contents.md

@@ -1999,6 +1999,10 @@ This corresponds to the [animationPolicy][] accessibility feature in Chromium.
 
 [animationPolicy]: https://developer.chrome.com/docs/extensions/reference/accessibilityFeatures/#property-animationPolicy
 
+#### `contents.getPreferredSize()`
+
+Returns [`Size`](structures/size.md) - The preferred size of the contents.
+
 ### Instance Properties
 
 #### `contents.audioMuted`

shell/browser/api/electron_api_web_contents.cc

@@ -3430,6 +3430,10 @@ void WebContents::SetImageAnimationPolicy(const std::string& new_policy) {
   web_contents()->OnWebPreferencesChanged();
 }
 
+gfx::Size WebContents::GetPreferredSize() {
+  return web_contents()->GetPreferredSize();
+}
+
 v8::Local<v8::Promise> WebContents::GetProcessMemoryInfo(v8::Isolate* isolate) {
   gin_helper::Promise<gin_helper::Dictionary> promise(isolate);
   v8::Local<v8::Promise> handle = promise.GetHandle();
@@ -4068,6 +4072,7 @@ v8::Local<v8::ObjectTemplate> WebContents::FillObjectTemplate(
       .SetMethod("takeHeapSnapshot", &WebContents::TakeHeapSnapshot)
       .SetMethod("setImageAnimationPolicy",
                  &WebContents::SetImageAnimationPolicy)
+      .SetMethod("getPreferredSize", &WebContents::GetPreferredSize)
       .SetMethod("_getProcessMemoryInfo", &WebContents::GetProcessMemoryInfo)
       .SetProperty("id", &WebContents::ID)
       .SetProperty("session", &WebContents::Session)

shell/browser/api/electron_api_web_contents.h

@@ -434,6 +434,7 @@ class WebContents : public ExclusiveAccessContext,
   void DoGetZoomLevel(
       electron::mojom::ElectronBrowser::DoGetZoomLevelCallback callback);
   void SetImageAnimationPolicy(const std::string& new_policy);
+  gfx::Size GetPreferredSize();
 
   // Grants |origin| access to |device|.
   // To be used in place of ObjectPermissionContextBase::GrantObjectPermission.