Hide the page info dialog if the underlying webcontents is hidden.

content/browser/android/web_contents_observer_proxy.cc

Index: content/browser/android/web_contents_observer_proxy.cc
diff --git a/content/browser/android/web_contents_observer_proxy.cc b/content/browser/android/web_contents_observer_proxy.cc
index ca274f8f0dd116f093012d0da0cf7dacb09234b9..e42d6bd0b5c44cb483da5c5711afdae038a83421 100644
--- a/content/browser/android/web_contents_observer_proxy.cc
+++ b/content/browser/android/web_contents_observer_proxy.cc
@@ -294,6 +294,18 @@ void WebContentsObserverProxy::DidFirstVisuallyNonEmptyPaint() {
   Java_WebContentsObserverProxy_didFirstVisuallyNonEmptyPaint(env, obj);
 }
 
+void WebContentsObserverProxy::WasShown() {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj(java_observer_);
+  Java_WebContentsObserverProxy_wasShown(env, obj);
+}
+
+void WebContentsObserverProxy::WasHidden() {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj(java_observer_);
+  Java_WebContentsObserverProxy_wasHidden(env, obj);
+}
+
 void WebContentsObserverProxy::DidStartNavigationToPendingEntry(
     const GURL& url,
     ReloadType reload_type) {