Add support for complete isolation of storage and permissions (cache, cookies, localStorage, access grants, etc) on a per-request-context basis (issue #1044).

- CefRequestContext instances can be configured using a new CefRequestContextSettings structure passed to CefRequestContext::CreateContext.
- Scheme registration is now per-request-context using new CefRequestContext::RegisterSchemeHandlerFactory and ClearSchemeHandlerFactories methods.
- Cookie managers are now per-request-context by default and can be retrieved using a new CefRequestContext::GetDefaultCookieManager method.
- CefURLRequest::Create now accepts an optional CefRequestContext argument for associating a URL request with a context (browser process only).
- The CefRequestContextHandler associated with a CefRequestContext will not be released until all objects related to that context have been destroyed.
- When the cache path is empty an in-memory cache ("incognito mode") will be used for storage and no data will be persisted to disk.
- Add CefSettings.user_data_path which specifies the location where user data such as spell checking dictionary files will be stored on disk.
- Add asynchronous callbacks for all CefCookieManager methods.
- Add PK_LOCAL_APP_DATA and PK_USER_DATA path keys for retrieving user directories via CefGetPath.
- cefclient: Add "New Window" test that creates a new window unrelated to existing windows. When used in combination with `--request-context-per-browser` the new window will be given a new and isolated request context.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@2040 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef/browser/browser_context_proxy.h

@@ -6,7 +6,6 @@
 #define CEF_LIBCEF_BROWSER_BROWSER_CONTEXT_PROXY_H_
 #pragma once
 
-#include "include/cef_request_context_handler.h"
 #include "libcef/browser/browser_context.h"
 #include "libcef/browser/browser_context_impl.h"
 
@@ -52,6 +51,9 @@ class CefBrowserContextProxy : public CefBrowserContext {
   content::SSLHostStateDelegate* GetSSLHostStateDelegate() override;
 
   // CefBrowserContext methods.
+  bool IsProxy() const override;
+  const CefRequestContextSettings& GetSettings() const override;
+  CefRefPtr<CefRequestContextHandler> GetHandler() const override;
   net::URLRequestContextGetter* CreateRequestContext(
       content::ProtocolHandlerMap* protocol_handlers,
       content::URLRequestInterceptorScopedVector request_interceptors)
@@ -63,7 +65,9 @@ class CefBrowserContextProxy : public CefBrowserContext {
       content::URLRequestInterceptorScopedVector request_interceptors)
       override;
 
-  CefRefPtr<CefRequestContextHandler> handler() const { return handler_; }
+  scoped_refptr<CefBrowserContextImpl> parent() const {
+    return parent_;
+  }
 
  private:
   // Only allow deletion via scoped_refptr().
@@ -73,8 +77,10 @@ class CefBrowserContextProxy : public CefBrowserContext {
 
   ~CefBrowserContextProxy() override;
 
+  // Members initialized during construction are safe to access from any thread.
   CefRefPtr<CefRequestContextHandler> handler_;
   scoped_refptr<CefBrowserContextImpl> parent_;
+
   scoped_ptr<CefDownloadManagerDelegate> download_manager_delegate_;
   scoped_refptr<CefURLRequestContextGetterProxy> url_request_getter_;