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

include/cef_urlrequest.h

@@ -41,6 +41,7 @@
 #include "include/cef_auth_callback.h"
 #include "include/cef_base.h"
 #include "include/cef_request.h"
+#include "include/cef_request_context.h"
 #include "include/cef_response.h"
 
 class CefURLRequestClient;
@@ -68,12 +69,16 @@ class CefURLRequest : public virtual CefBase {
   // would not normally be rendered then the response may receive special
   // handling inside the browser (for example, via the file download code path
   // instead of the URL request code path). The |request| object will be marked
-  // as read-only after calling this method.
+  // as read-only after calling this method. In the browser process if
+  // |request_context| is empty the global request context will be used. In the
+  // render process |request_context| must be empty and the context associated
+  // with the current renderer process' browser will be used.
   ///
-  /*--cef()--*/
+  /*--cef(optional_param=request_context)--*/
   static CefRefPtr<CefURLRequest> Create(
       CefRefPtr<CefRequest> request,
-      CefRefPtr<CefURLRequestClient> client);
+      CefRefPtr<CefURLRequestClient> client,
+      CefRefPtr<CefRequestContext> request_context);
 
   ///
   // Returns the request object used to create this URL request. The returned