Revert of Move navigation-induced hiding of form-validation-bubble to the browser process.

third_party/WebKit/Source/core/page/ValidationMessageClientImpl.cpp

Index: third_party/WebKit/Source/core/page/ValidationMessageClientImpl.cpp
diff --git a/third_party/WebKit/Source/core/page/ValidationMessageClientImpl.cpp b/third_party/WebKit/Source/core/page/ValidationMessageClientImpl.cpp
index 575f9bfb5db39961e07f1f1ece56c4b7945a8e40..f2e3c3bc44b3c0a71619a3ce8c4b2ea704e121cc 100644
--- a/third_party/WebKit/Source/core/page/ValidationMessageClientImpl.cpp
+++ b/third_party/WebKit/Source/core/page/ValidationMessageClientImpl.cpp
@@ -115,6 +115,16 @@
   return current_anchor_ == &anchor;
 }
 
+void ValidationMessageClientImpl::WillUnloadDocument(const Document& document) {
+  if (current_anchor_ && current_anchor_->GetDocument() == document)
+    HideValidationMessage(*current_anchor_);
+}
+
+void ValidationMessageClientImpl::DocumentDetached(const Document& document) {
+  DCHECK(!current_anchor_ || current_anchor_->GetDocument() != document)
+      << "willUnloadDocument() should be called beforehand.";
+}
+
 void ValidationMessageClientImpl::CheckAnchorStatus(TimerBase*) {
   DCHECK(current_anchor_);
   if (MonotonicallyIncreasingTime() >= finish_time_ || !CurrentView()) {