Don't leave renderer process frozen when canceling JavaScript dialogs.

chrome/browser/ui/browser_browsertest.cc

Index: chrome/browser/ui/browser_browsertest.cc
diff --git a/chrome/browser/ui/browser_browsertest.cc b/chrome/browser/ui/browser_browsertest.cc
index 56901bcdfb435f9800494117dd64cd875f9a7148..4d1813f58a860c1666bf3bfaa6ab58c403412f4c 100644
--- a/chrome/browser/ui/browser_browsertest.cc
+++ b/chrome/browser/ui/browser_browsertest.cc
@@ -231,6 +231,9 @@ class TestInterstitialPage : public content::InterstitialPageDelegate {
   void Proceed() {
     interstitial_page_->Proceed();
   }
+  void DontProceed() {
+    interstitial_page_->DontProceed();
+  }
 
   virtual std::string GetHTMLContents() OVERRIDE {
     return "<h1>INTERSTITIAL</h1>";
@@ -1727,10 +1730,13 @@ IN_PROC_BROWSER_TEST_F(BrowserTest, InterstitialClosesDialogs) {
     InterstitialObserver observer(contents,
                                   base::Closure(),
                                   loop_runner->QuitClosure());
-    interstitial->Proceed();
+    interstitial->DontProceed();
     loop_runner->Run();
     // interstitial is deleted now.
   }
+
+  // Make sure input events still work in the renderer process.
+  EXPECT_FALSE(contents->GetRenderProcessHost()->IgnoreInputEvents());
 }