Expose PageImportanceSignals via WebContents

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 91713f5523e65f1930bccb4df7a7e0129cad955b..5c2a1871640bb86d3d3fe4adb82ff8fcd7396691 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -57,6 +57,7 @@
 #include "content/public/common/favicon_url.h"
 #include "content/public/common/file_chooser_file_info.h"
 #include "content/public/common/file_chooser_params.h"
+#include "content/public/common/page_importance_signals.h"
 #include "content/public/common/page_state.h"
 #include "content/public/common/page_zoom.h"
 #include "content/public/common/ssl_status.h"
@@ -151,6 +152,7 @@
 #include "third_party/WebKit/public/web/WebNavigationPolicy.h"
 #include "third_party/WebKit/public/web/WebNetworkStateNotifier.h"
 #include "third_party/WebKit/public/web/WebNodeList.h"
+#include "third_party/WebKit/public/web/WebPageImportanceSignals.h"
 #include "third_party/WebKit/public/web/WebPageSerializer.h"
 #include "third_party/WebKit/public/web/WebPlugin.h"
 #include "third_party/WebKit/public/web/WebPluginAction.h"
@@ -3460,6 +3462,19 @@ void RenderViewImpl::draggableRegionsChanged() {
       DraggableRegionsChanged(webview()->mainFrame()));
 }
 
+void RenderViewImpl::pageImportanceSignalsChanged() {
+  if (!webview() || !main_render_frame_)
+    return;
+
+  const auto& web_signals = webview()->pageImportanceSignals();
+
+  PageImportanceSignals signals;
+  signals.had_form_interaction = web_signals->hadFormInteraction();
+
+  main_render_frame_->Send(new FrameHostMsg_UpdatePageImportanceSignals(
+      main_render_frame_->GetRoutingID(), signals));
+}
+
 #if defined(OS_ANDROID)
 WebContentDetectionResult RenderViewImpl::detectContentAround(
     const WebHitTestResult& touch_hit) {