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 aebac36cdf7eaa62e893adfb7cf06de3cec19854..5f79a7629c65330ba7b013ced35d01afbf08258f 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"
@@ -3519,6 +3521,22 @@ void RenderViewImpl::draggableRegionsChanged() {
       DraggableRegionsChanged(webview()->mainFrame()));
 }
 
+void RenderViewImpl::pageImportanceSignalsChanged() {
+  if (!webview())

[kinuko, 2015/09/24 00:26:22]

nit: Could this happen when this is signaled?

[kouhei (in TOK), 2015/09/24 01:13:46]

Yes. This can happen when the view is closing.

+    return;
+
+  blink::WebPageImportanceSignals* web_signals =
+      webview()->pageImportanceSignals();
+  if (!web_signals)

[kinuko, 2015/09/24 00:26:23]

ditto

[kouhei (in TOK), 2015/09/24 01:13:46]

web_signals is guaranteed to be non-null now. Fixed.

+    return;
+
+  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) {