Navigation transitions: Initiate navigation transition and send serialized markup to Chrome

Source/core/loader/FrameLoaderClient.h

Index: Source/core/loader/FrameLoaderClient.h
diff --git a/Source/core/loader/FrameLoaderClient.h b/Source/core/loader/FrameLoaderClient.h
index 84272af5cbfffd0767e9aa78c4c9e9f774c81e38..1f812cbba18274b57aedcb0e89d486af2239711e 100644
--- a/Source/core/loader/FrameLoaderClient.h
+++ b/Source/core/loader/FrameLoaderClient.h
@@ -100,7 +100,7 @@ namespace WebCore {
         virtual void dispatchDidReceiveServerRedirectForProvisionalLoad() = 0;
         virtual void dispatchDidNavigateWithinPage(HistoryItem*, HistoryCommitType) { }
         virtual void dispatchWillClose() = 0;
-        virtual void dispatchDidStartProvisionalLoad() = 0;
+        virtual void dispatchDidStartProvisionalLoad(bool isTransitionNavigation) = 0;
         virtual void dispatchDidReceiveTitle(const String&) = 0;
         virtual void dispatchDidChangeIcons(IconType) = 0;
         virtual void dispatchDidCommitLoad(LocalFrame*, HistoryItem*, HistoryCommitType) = 0;
@@ -111,8 +111,9 @@ namespace WebCore {
         virtual void dispatchDidFirstVisuallyNonEmptyLayout() = 0;
         virtual void dispatchDidChangeThemeColor() = 0;
 
-        virtual NavigationPolicy decidePolicyForNavigation(const ResourceRequest&, DocumentLoader*, NavigationPolicy) = 0;
+        virtual NavigationPolicy decidePolicyForNavigation(const ResourceRequest&, DocumentLoader*, NavigationPolicy, bool isTransitionNavigation) = 0;
 
+        virtual void dispatchAddNavigationTransitionData(const String& origin, const String& selector, const String& markup) { }
         virtual void dispatchWillRequestResource(FetchRequest*) { }
 
         virtual void dispatchWillSendSubmitEvent(HTMLFormElement*) = 0;