Added an integration test for kasko hang reports

content/browser/frame_host/debug_urls.cc

Index: content/browser/frame_host/debug_urls.cc
diff --git a/content/browser/frame_host/debug_urls.cc b/content/browser/frame_host/debug_urls.cc
index f3190a74acb2d0f2da878ae048840a5c045c490c..833b0063ab4a5efc1f1bbd86c6f6cc763e612ecf 100644
--- a/content/browser/frame_host/debug_urls.cc
+++ b/content/browser/frame_host/debug_urls.cc
@@ -31,6 +31,11 @@
 
 namespace content {
 
+class ScopedAllowWaitForDebugURL {
+ private:
+  base::ThreadRestrictions::ScopedAllowWait wait;
+};
+
 namespace {
 
 // Define the Asan debug URLs.
@@ -164,14 +169,13 @@ bool HandleAsanDebugURL(const GURL& url) {
   return true;
 }
 
+void HangCurrentThread() {
+  ScopedAllowWaitForDebugURL allow_wait;
+  base::WaitableEvent(false, false).Wait();
+}
 
 }  // namespace
 
-class ScopedAllowWaitForDebugURL {
- private:
-  base::ThreadRestrictions::ScopedAllowWait wait;
-};
-
 bool HandleDebugURL(const GURL& url, ui::PageTransition transition) {
   // Ensure that the user explicitly navigated to this URL, unless
   // kEnableGpuBenchmarking is enabled by Telemetry.
@@ -199,8 +203,16 @@ bool HandleDebugURL(const GURL& url, ui::PageTransition transition) {
   }
 
   if (url == GURL(kChromeUIBrowserUIHang)) {
-    ScopedAllowWaitForDebugURL allow_wait;
-    base::WaitableEvent(false, false).Wait();
+    HangCurrentThread();
+    return true;
+  }
+
+  if (url == GURL(kChromeUIDelayedBrowserUIHang)) {
+    // Webdriver-safe url to hang the ui thread. Webdriver waits for the onload
+    // event in javascript which needs a little more time to fire.
+    BrowserThread::PostDelayedTask(BrowserThread::UI, FROM_HERE,
+                                   base::Bind(&HangCurrentThread),
+                                   base::TimeDelta::FromSeconds(2));
     return true;
   }