[windows] Honor only valid resize requests

Fixes: flutter/flutter#74797

Author: iskakaushik

shell/platform/windows/flutter_windows_view.cc

@@ -8,6 +8,16 @@
 
 namespace flutter {
 
+static bool IsValidResize(size_t cur_width,
+                          size_t cur_height,
+                          size_t target_width,
+                          size_t target_height) {
+  bool non_zero_dims = target_height > 0 && target_width > 0;
+  bool not_same_size =
+      (cur_height != target_height) || (cur_width != target_width);
+  return non_zero_dims && not_same_size;
+}
+
 FlutterWindowsView::FlutterWindowsView(
     std::unique_ptr<WindowBindingHandler> window_binding) {
   surface_manager_ = std::make_unique<AngleSurfaceManager>();
@@ -80,19 +90,22 @@ uint32_t FlutterWindowsView::GetFrameBufferId(size_t width, size_t height) {
 void FlutterWindowsView::OnWindowSizeChanged(size_t width, size_t height) {
   // Called on the platform thread.
   std::unique_lock<std::mutex> lock(resize_mutex_);
+  if (!IsValidResize(resize_target_width_, resize_target_height_, width,
+                     height)) {
+    return;
+  }
+
   resize_status_ = ResizeState::kResizeStarted;
   resize_target_width_ = width;
   resize_target_height_ = height;
   SendWindowMetrics(width, height, binding_handler_->GetDpiScale());
 
-  if (width > 0 && height > 0) {
-    // Block the platform thread until:
-    //   1. GetFrameBufferId is called with the right frame size.
-    //   2. Any pending SwapBuffers calls have been invoked.
-    resize_cv_.wait(lock, [&resize_status = resize_status_] {
-      return resize_status == ResizeState::kDone;
-    });
-  }
+  // Block the platform thread until:
+  //   1. GetFrameBufferId is called with the right frame size.
+  //   2. Any pending SwapBuffers calls have been invoked.
+  resize_cv_.wait(lock, [&resize_status = resize_status_] {
+    return resize_status == ResizeState::kDone;
+  });
 }
 
 void FlutterWindowsView::OnPointerMove(double x, double y) {