chrome: Fix callbacks for different Profile types (see issue #2969)

- Only install network intercepts for Profiles that have an associated
  CefBrowserContext. For incognito windows the CefBrowserContext is
  associated with the OffTheRecordProfileImpl's original Profile.
- cefsimple: Return the default CefClient instance for browser windows
  created via the Chrome UI, and allow Chrome to show error pages.

libcef/browser/chrome/chrome_content_browser_client_cef.cc

@@ -170,6 +170,13 @@ bool ChromeContentBrowserClientCef::WillCreateURLLoaderFactory(
     return use_proxy;
   }
 
+  // Don't intercept requests for Profiles that were not created by CEF.
+  // For example, the User Manager profile created via
+  // profiles::CreateSystemProfileForUserManager.
+  auto profile = Profile::FromBrowserContext(browser_context);
+  if (!CefBrowserContext::FromBrowserContext(profile->GetOriginalProfile()))
+    return false;
+
   auto request_handler = net_service::CreateInterceptedRequestHandler(
       browser_context, frame, render_process_id,
       type == URLLoaderFactoryType::kNavigation,

libcef/browser/net_service/resource_request_handler_wrapper.cc

@@ -260,8 +260,10 @@ class InterceptedRequestHandlerWrapper : public InterceptedRequestHandler {
       CEF_REQUIRE_UIT();
 
       browser_context_ = browser_context;
+
+      auto profile = Profile::FromBrowserContext(browser_context);
       auto cef_browser_context =
-          CefBrowserContext::FromBrowserContext(browser_context);
+          CefBrowserContext::FromBrowserContext(profile->GetOriginalProfile());
       iothread_state_ = cef_browser_context->iothread_state();
       DCHECK(iothread_state_);
       cookieable_schemes_ = cef_browser_context->GetCookieableSchemes();

tests/cefsimple/simple_app.cc

@@ -85,8 +85,7 @@ void SimpleApp::OnContextInitialized() {
   CefRefPtr<CefCommandLine> command_line =
       CefCommandLine::GetGlobalCommandLine();
 
-  const bool enable_chrome_runtime =
-      command_line->HasSwitch("enable-chrome-runtime");
+  const bool enable_chrome_runtime = SimpleHandler::IsChromeRuntimeEnabled();
 
 #if defined(OS_WIN) || defined(OS_LINUX)
   // Create the browser using the Views framework if "--use-views" is specified
@@ -135,3 +134,8 @@ void SimpleApp::OnContextInitialized() {
                                   nullptr, nullptr);
   }
 }
+
+CefRefPtr<CefClient> SimpleApp::GetDefaultClient() {
+  // Called when a new browser window is created via the Chrome runtime UI.
+  return SimpleHandler::GetInstance();
+}

tests/cefsimple/simple_app.h

@@ -13,13 +13,13 @@ class SimpleApp : public CefApp, public CefBrowserProcessHandler {
   SimpleApp();
 
   // CefApp methods:
-  virtual CefRefPtr<CefBrowserProcessHandler> GetBrowserProcessHandler()
-      OVERRIDE {
+  CefRefPtr<CefBrowserProcessHandler> GetBrowserProcessHandler() OVERRIDE {
     return this;
   }
 
   // CefBrowserProcessHandler methods:
-  virtual void OnContextInitialized() OVERRIDE;
+  void OnContextInitialized() OVERRIDE;
+  CefRefPtr<CefClient> GetDefaultClient() OVERRIDE;
 
  private:
   // Include the default reference counting implementation.

tests/cefsimple/simple_handler.cc

@@ -47,6 +47,10 @@ void SimpleHandler::OnTitleChange(CefRefPtr<CefBrowser> browser,
                                   const CefString& title) {
   CEF_REQUIRE_UI_THREAD();
 
+  // Allow Chrome to handle the title change.
+  if (IsChromeRuntimeEnabled())
+    return;
+
   if (use_views_) {
     // Set the title of the window using the Views framework.
     CefRefPtr<CefBrowserView> browser_view =
@@ -110,6 +114,10 @@ void SimpleHandler::OnLoadError(CefRefPtr<CefBrowser> browser,
                                 const CefString& failedUrl) {
   CEF_REQUIRE_UI_THREAD();
 
+  // Allow Chrome to show the error page.
+  if (IsChromeRuntimeEnabled())
+    return;
+
   // Don't display an error for downloaded files.
   if (errorCode == ERR_ABORTED)
     return;
@@ -139,3 +147,14 @@ void SimpleHandler::CloseAllBrowsers(bool force_close) {
   for (; it != browser_list_.end(); ++it)
     (*it)->GetHost()->CloseBrowser(force_close);
 }
+
+// static
+bool SimpleHandler::IsChromeRuntimeEnabled() {
+  static int value = -1;
+  if (value == -1) {
+    CefRefPtr<CefCommandLine> command_line =
+        CefCommandLine::GetGlobalCommandLine();
+    value = command_line->HasSwitch("enable-chrome-runtime") ? 1 : 0;
+  }
+  return value == 1;
+}

tests/cefsimple/simple_handler.h

@@ -50,6 +50,9 @@ class SimpleHandler : public CefClient,
 
   bool IsClosing() const { return is_closing_; }
 
+  // Returns true if the Chrome runtime is enabled.
+  static bool IsChromeRuntimeEnabled();
+
  private:
   // Platform-specific implementation.
   void PlatformTitleChange(CefRefPtr<CefBrowser> browser,