DevTools: disable input event processing while auditing with lighthouse.

content/browser/devtools/protocol/input_handler.cc

Index: content/browser/devtools/protocol/input_handler.cc
diff --git a/content/browser/devtools/protocol/input_handler.cc b/content/browser/devtools/protocol/input_handler.cc
index 967dd2cd21e0a91ca65631cfd8d26ecea4d3a5ba..cc419a3523f453021293befbc3807a5f073f1e75 100644
--- a/content/browser/devtools/protocol/input_handler.cc
+++ b/content/browser/devtools/protocol/input_handler.cc
@@ -211,11 +211,17 @@ std::vector<InputHandler*> InputHandler::ForAgentHost(
 
 void InputHandler::SetRenderFrameHost(RenderFrameHostImpl* host) {
   ClearPendingKeyAndMouseCallbacks();
-  if (host_)
+  if (host_) {
     host_->GetRenderWidgetHost()->RemoveInputEventObserver(this);
+    if (ignore_input_events_)
+      host_->GetRenderWidgetHost()->SetIgnoreInputEvents(false);
+  }
   host_ = host;
-  if (host)
+  if (host) {
     host->GetRenderWidgetHost()->AddInputEventObserver(this);
+    if (ignore_input_events_)
+      host_->GetRenderWidgetHost()->SetIgnoreInputEvents(true);
+  }
 }
 
 void InputHandler::OnInputEvent(const blink::WebInputEvent& event) {
@@ -246,8 +252,12 @@ void InputHandler::OnSwapCompositorFrame(
 
 Response InputHandler::Disable() {
   ClearPendingKeyAndMouseCallbacks();
-  if (host_)
+  if (host_) {
     host_->GetRenderWidgetHost()->RemoveInputEventObserver(this);
+    if (ignore_input_events_)
+      host_->GetRenderWidgetHost()->SetIgnoreInputEvents(false);
+  }
+  ignore_input_events_ = false;
   return Response::OK();
 }
 
@@ -458,6 +468,13 @@ Response InputHandler::EmulateTouchFromMouseEvent(const std::string& type,
   return Response::OK();
 }
 
+Response InputHandler::SetIgnoreInputEvents(bool ignore) {
+  ignore_input_events_ = ignore;
+  if (host_)
+    host_->GetRenderWidgetHost()->SetIgnoreInputEvents(ignore);
+  return Response::OK();
+}
+
 void InputHandler::SynthesizePinchGesture(
     int x,
     int y,