Add chrome runtime support for more callbacks and ceftests (see issue #2969)

This change adds support for:
- Protocol and request handling.
- Loading and navigation events.
- Display and focus events.
- Mouse/keyboard events.
- Popup browsers.
- Callbacks in the renderer process.
- Misc. functionality required for ceftests.

This change also adds a new CefBrowserProcessHandler::GetCookieableSchemes
callback for configuring global state that will be applied to all
CefCookieManagers by default. This global callback is currently required by the
chrome runtime because the primary ProfileImpl is created via
ChromeBrowserMainParts::PreMainMessageLoopRun (CreatePrimaryProfile) before
OnContextCreated can be called.

ProfileImpl will use the "C:\Users\[user]\AppData\Local\CEF\User Data\Default"
directory by default (on Windows). Cookies may persist in this directory when
running ceftests and may need to be manually deleted if those tests fail.

Remaining work includes:
- Support for client-created request contexts.
- Embedding the browser in a Views hierarchy (cefclient support).
- TryCloseBrowser and DoClose support.
- Most of the CefSettings configuration.
- DevTools protocol and window control (ShowDevTools, ExecuteDevToolsMethod).
- CEF-specific WebUI pages (about, license, webui-hosts).
- Context menu customization (CefContextMenuHandler).
- Auto resize (SetAutoResizeEnabled).
- Zoom settings (SetZoomLevel).
- File dialog runner (RunFileDialog).
- File and JS dialog handlers (CefDialogHandler, CefJSDialogHandler).
- Extension loading (LoadExtension, etc).
- Plugin loading (OnBeforePluginLoad).
- Widevine loading (CefRegisterWidevineCdm).
- PDF and print preview does not display.
- Crash reporting is untested.
- Mac: Web content loads but does not display.

The following ceftests are now passing when run with the
"--enable-chrome-runtime" command-line flag:

CorsTest.*
DisplayTest.*:-DisplayTest.AutoResize
DOMTest.*
DraggableRegionsTest.*
ImageTest.*
MessageRouterTest.*
NavigationTest.*
ParserTest.*
RequestContextTest.*Global*
RequestTest.*
ResourceManagerTest.*
ResourceRequestHandlerTest.*
ResponseTest.*
SchemeHandlerTest.*
ServerTest.*
StreamResourceHandlerTest.*
StreamTest.*
StringTest.*
TaskTest.*
TestServerTest.*
ThreadTest.*
URLRequestTest.*Global*
V8Test.*:-V8Test.OnUncaughtExceptionDevTools
ValuesTest.*
WaitableEventTest.*
XmlReaderTest.*
ZipReaderTest.*

libcef/browser/browser_info_manager.cc

@@ -6,7 +6,7 @@
 
 #include <utility>
 
-#include "libcef/browser/alloy/alloy_browser_host_impl.h"
+#include "libcef/browser/browser_host_base.h"
 #include "libcef/browser/browser_platform_delegate.h"
 #include "libcef/browser/extensions/browser_extensions_util.h"
 #include "libcef/browser/thread_util.h"
@@ -24,7 +24,6 @@
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/child_process_host.h"
 #include "content/public/common/url_constants.h"
-#include "extensions/common/constants.h"
 
 namespace {
 
@@ -117,14 +116,13 @@ bool CefBrowserInfoManager::CanCreateWindow(
     bool opener_suppressed,
     bool* no_javascript_access) {
   CEF_REQUIRE_UIT();
-  REQUIRE_ALLOY_RUNTIME();
 
   content::OpenURLParams params(target_url, referrer, disposition,
                                 ui::PAGE_TRANSITION_LINK,
                                 /*is_renderer_initiated=*/true);
   params.user_gesture = user_gesture;
 
-  CefRefPtr<AlloyBrowserHostImpl> browser;
+  CefRefPtr<CefBrowserHostBase> browser;
   if (!MaybeAllowNavigation(opener, params, browser) || !browser) {
     // Cancel the popup.
     return false;
@@ -182,9 +180,9 @@ bool CefBrowserInfoManager::CanCreateWindow(
   }
 
   if (allow) {
-    CefBrowserHostBase::CreateParams create_params;
+    CefBrowserCreateParams create_params;
 
-    if (!browser->IsViewsHosted())
+    if (!browser->HasView())
       create_params.window_info = std::move(window_info);
 
     create_params.settings = pending_popup->settings;
@@ -243,12 +241,16 @@ void CefBrowserInfoManager::WebContentsCreated(
     std::unique_ptr<CefBrowserPlatformDelegate>& platform_delegate,
     CefRefPtr<CefDictionaryValue>& extra_info) {
   CEF_REQUIRE_UIT();
-  REQUIRE_ALLOY_RUNTIME();
+
+  // GET_CUSTOM_WEB_CONTENTS_VIEW is only used with the alloy runtime.
+  const auto previous_step =
+      cef::IsAlloyRuntimeEnabled()
+          ? CefBrowserInfoManager::PendingPopup::GET_CUSTOM_WEB_CONTENTS_VIEW
+          : CefBrowserInfoManager::PendingPopup::CAN_CREATE_WINDOW;
 
   std::unique_ptr<CefBrowserInfoManager::PendingPopup> pending_popup =
-      PopPendingPopup(
-          CefBrowserInfoManager::PendingPopup::GET_CUSTOM_WEB_CONTENTS_VIEW,
-          opener_render_process_id, opener_render_routing_id, target_url);
+      PopPendingPopup(previous_step, opener_render_process_id,
+                      opener_render_routing_id, target_url);
   DCHECK(pending_popup.get());
   DCHECK(pending_popup->platform_delegate.get());
 
@@ -365,29 +367,18 @@ CefBrowserInfoManager::GetBrowserInfoForFrameRoute(int render_process_id,
 bool CefBrowserInfoManager::MaybeAllowNavigation(
     content::RenderFrameHost* opener,
     const content::OpenURLParams& params,
-    CefRefPtr<AlloyBrowserHostImpl>& browser_out) const {
+    CefRefPtr<CefBrowserHostBase>& browser_out) const {
   CEF_REQUIRE_UIT();
-  REQUIRE_ALLOY_RUNTIME();
 
   bool is_guest_view = false;
-  CefRefPtr<AlloyBrowserHostImpl> browser = static_cast<AlloyBrowserHostImpl*>(
-      extensions::GetOwnerBrowserForHost(opener, &is_guest_view).get());
+  auto browser = extensions::GetOwnerBrowserForHost(opener, &is_guest_view);
   if (!browser) {
     // Print preview uses a modal dialog where we don't own the WebContents.
     // Allow that navigation to proceed.
     return true;
   }
 
-  if (is_guest_view && !params.url.SchemeIs(extensions::kExtensionScheme) &&
-      !params.url.SchemeIs(content::kChromeUIScheme)) {
-    // The PDF viewer will load the PDF extension in the guest view, and print
-    // preview will load chrome://print in the guest view. All other navigations
-    // are passed to the owner browser.
-    CEF_POST_TASK(
-        CEF_UIT,
-        base::Bind(base::IgnoreResult(&AlloyBrowserHostImpl::OpenURLFromTab),
-                   browser.get(), nullptr, params));
-
+  if (!browser->MaybeAllowNavigation(opener, is_guest_view, params)) {
     return false;
   }