Enforce constant size and device scale factor for surfaces

android_webview/browser/surfaces_instance.cc

Index: android_webview/browser/surfaces_instance.cc
diff --git a/android_webview/browser/surfaces_instance.cc b/android_webview/browser/surfaces_instance.cc
index b8599fe91175b5e7f1707cb68f7d8cf789bf212a..76d1df9b2df8aa91624dcfe2fa8bf4e363b30746 100644
--- a/android_webview/browser/surfaces_instance.cc
+++ b/android_webview/browser/surfaces_instance.cc
@@ -139,6 +139,7 @@ void SurfacesInstance::DrawAndSwap(const gfx::Size& viewport,
   frame.metadata.begin_frame_ack =
       cc::BeginFrameAck::CreateManualAckWithDamage();
   frame.render_pass_list.push_back(std::move(render_pass));
+  frame.metadata.device_scale_factor = 1.f;
   frame.metadata.referenced_surfaces = child_ids_;
 
   if (!root_id_.is_valid() || frame_size != surface_size_) {
@@ -186,6 +187,7 @@ void SurfacesInstance::SetSolidColorRootFrame() {
   frame.metadata.begin_frame_ack =
       cc::BeginFrameAck::CreateManualAckWithDamage();
   frame.metadata.referenced_surfaces = child_ids_;
+  frame.metadata.device_scale_factor = 1;
   support_->SubmitCompositorFrame(root_id_, std::move(frame));
 }
 
@@ -206,4 +208,8 @@ void SurfacesInstance::ReclaimResources(
   CHECK(resources.empty());
 }
 
+void SurfacesInstance::DidRejectCompositorFrame() {
+  NOTREACHED();
+}
+
 }  // namespace android_webview