Remove the CHECK from the DirectManipulationHelper::Activate function as it is firing in Canary on …

content/browser/renderer_host/legacy_render_widget_host_win.cc

Index: content/browser/renderer_host/legacy_render_widget_host_win.cc
diff --git a/content/browser/renderer_host/legacy_render_widget_host_win.cc b/content/browser/renderer_host/legacy_render_widget_host_win.cc
index 8dcdaf63c98cd899bbae46fbbcb7a77e848774ce..c04d108b9218e6191a6cb6d4126efd63a4589a97 100644
--- a/content/browser/renderer_host/legacy_render_widget_host_win.cc
+++ b/content/browser/renderer_host/legacy_render_widget_host_win.cc
@@ -76,8 +76,6 @@ HWND LegacyRenderWidgetHostHWND::GetParent() {
 
 void LegacyRenderWidgetHostHWND::Show() {
   ::ShowWindow(hwnd(), SW_SHOW);
-  if (direct_manipulation_helper_)
-    direct_manipulation_helper_->Activate(hwnd());
 }
 
 void LegacyRenderWidgetHostHWND::Hide() {
@@ -397,4 +395,18 @@ LRESULT LegacyRenderWidgetHostHWND::OnSize(UINT message,
   return 0;
 }
 
+LRESULT LegacyRenderWidgetHostHWND::OnWindowPosChanged(UINT message,
+                                                       WPARAM w_param,
+                                                       LPARAM l_param) {
+  WINDOWPOS* window_pos = reinterpret_cast<WINDOWPOS*>(l_param);
+  if (direct_manipulation_helper_) {
+    if (window_pos->flags & SWP_SHOWWINDOW) {
+      direct_manipulation_helper_->Activate(hwnd());
+    } else if (window_pos->flags & SWP_HIDEWINDOW) {
+      direct_manipulation_helper_->Deactivate(hwnd());
+    }
+  }
+  return 0;

[sky, 2015/08/14 20:56:37]

Do you need the SetMsgHandled(FALSE); ?

[ananta, 2015/08/14 21:04:30]

Done. 

+}
+
 }  // namespace content