[Sync] Rewrote about:sync backend to use WeakHandles

This simplifies the handling of JS messages, replies, and events.

Made ProcessJsMessage take a WeakHandle to a JsReplyHandler instead of
having a JsEventRouter class (which is now removed).

Add JsBackend parameter to OnInitializationComplete().

Renamed JsFrontend to JsController.

Renamed JsEventHandlerList to SyncJsController.

Handle events that happen before sync is initialized.

Made about:sync work in incognito mode.

BUG=90942,76809
TEST=

Review URL: http://codereview.chromium.org/7518014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@95119 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 16 insertions, 4 deletions

diff --git a/chrome/browser/sync/js_test_util.cc b/chrome/browser/sync/js_test_util.cc
index 7884ea2..eea7576 100644
--- a/chrome/browser/sync/js_test_util.cc
+++ b/chrome/browser/sync/js_test_util.cc
@@ -109,17 +109,29 @@ MockJsBackend::MockJsBackend() {}
 
 MockJsBackend::~MockJsBackend() {}
 
-MockJsFrontend::MockJsFrontend() {}
+WeakHandle<JsBackend> MockJsBackend::AsWeakHandle() {
+  return WeakHandle<JsBackend>(AsWeakPtr());
+}
+
+MockJsController::MockJsController() {}
 
-MockJsFrontend::~MockJsFrontend() {}
+MockJsController::~MockJsController() {}
 
 MockJsEventHandler::MockJsEventHandler() {}
 
+WeakHandle<JsEventHandler> MockJsEventHandler::AsWeakHandle() {
+  return WeakHandle<JsEventHandler>(AsWeakPtr());
+}
+
 MockJsEventHandler::~MockJsEventHandler() {}
 
-MockJsEventRouter::MockJsEventRouter() {}
+MockJsReplyHandler::MockJsReplyHandler() {}
+
+MockJsReplyHandler::~MockJsReplyHandler() {}
 
-MockJsEventRouter::~MockJsEventRouter() {}
+WeakHandle<JsReplyHandler> MockJsReplyHandler::AsWeakHandle() {
+  return WeakHandle<JsReplyHandler>(AsWeakPtr());
+}
 
 }  // namespace browser_sync