Prevent duplicate navigation to debug URLs from Telemetry.

content/browser/frame_host/navigation_controller_impl.cc

Index: content/browser/frame_host/navigation_controller_impl.cc
diff --git a/content/browser/frame_host/navigation_controller_impl.cc b/content/browser/frame_host/navigation_controller_impl.cc
index a25aeba2e7496d540593fba2622b239992547ad9..a60274171df63ac275af93636bdd64520bb301e9 100644
--- a/content/browser/frame_host/navigation_controller_impl.cc
+++ b/content/browser/frame_host/navigation_controller_impl.cc
@@ -652,8 +652,13 @@ void NavigationControllerImpl::LoadURL(
 
 void NavigationControllerImpl::LoadURLWithParams(const LoadURLParams& params) {
   TRACE_EVENT0("browser", "NavigationControllerImpl::LoadURLWithParams");
-  if (HandleDebugURL(params.url, params.transition_type))
-    return;
+  if (HandleDebugURL(params.url, params.transition_type)) {
+    // If Telemetry is running, allow the URL load to proceed as if it's
+    // unhandled, otherwise Telemetry can't tell if Navigation completed.
+    if (!CommandLine::ForCurrentProcess()->HasSwitch(
+            cc::switches::kEnableGpuBenchmarking))
+      return;
+  }
 
   // Any renderer-side debug URLs or javascript: URLs should be ignored if the
   // renderer process is not live, unless it is the initial navigation of the
@@ -1035,18 +1040,8 @@ void NavigationControllerImpl::RendererDidNavigateToNewPage(
     // update the virtual URL when replaceState is called after a pushState.
     GURL url = params.url;
     bool needs_update = false;
-    // We call RewriteURLIfNecessary twice: once when page navigation
-    // begins in CreateNavigationEntry, and once here when it commits.
-    // With the kEnableGpuBenchmarking flag, the rewriting includes
-    // handling debug URLs which cause an action to occur, and thus we
-    // should not rewrite them a second time.
-    bool skip_rewrite =
-        IsDebugURL(url) && base::CommandLine::ForCurrentProcess()->HasSwitch(
-            cc::switches::kEnableGpuBenchmarking);
-    if (!skip_rewrite) {
-      BrowserURLHandlerImpl::GetInstance()->RewriteURLIfNecessary(
-          &url, browser_context_, &needs_update);
-    }
+    BrowserURLHandlerImpl::GetInstance()->RewriteURLIfNecessary(
+        &url, browser_context_, &needs_update);
     new_entry->set_update_virtual_url_with_url(needs_update);
 
     // When navigating to a new page, give the browser URL handler a chance to