Move xfa/fwl/core to xfa/fwl.

The core/ directory in FWL no-longer provides any context. This Cl moves all
of the core/ files up to the fwl/ folder.

As well, the CFWL_EvtFoo files are renamed CFWL_EventFoo and the CFWL_MsgFoo
files are renamed CFWL_MessageFoo. The event and message preceed the type in
order to keep the files sorted together and to make it clear that they're all
related.

Review-Url: https://codereview.chromium.org/2559173002
diff --git a/fpdfsdk/DEPS b/fpdfsdk/DEPS
index ce037d9..e077225 100644
--- a/fpdfsdk/DEPS
+++ b/fpdfsdk/DEPS
@@ -2,7 +2,7 @@
   '+core',
   '+public',
   '+v8',
-  '+xfa/fwl/core',
+  '+xfa/fwl',
   '+xfa/fxbarcode',
   '+xfa/fxfa',
   '+xfa/fxgraphics',
diff --git a/fpdfsdk/cpdfsdk_xfawidgethandler.cpp b/fpdfsdk/cpdfsdk_xfawidgethandler.cpp
index 11c560b..eff351b 100644
--- a/fpdfsdk/cpdfsdk_xfawidgethandler.cpp
+++ b/fpdfsdk/cpdfsdk_xfawidgethandler.cpp
@@ -13,8 +13,8 @@
 #include "fpdfsdk/cpdfsdk_pageview.h"
 #include "fpdfsdk/cpdfsdk_xfawidget.h"
 #include "fpdfsdk/fpdfxfa/cpdfxfa_context.h"
-#include "xfa/fwl/core/cfwl_app.h"
-#include "xfa/fwl/core/fwl_widgethit.h"
+#include "xfa/fwl/cfwl_app.h"
+#include "xfa/fwl/fwl_widgethit.h"
 #include "xfa/fxfa/fxfa_basic.h"
 #include "xfa/fxfa/xfa_ffdocview.h"
 #include "xfa/fxfa/xfa_ffpageview.h"
diff --git a/fpdfsdk/fpdfxfa/cxfa_fwladaptertimermgr.h b/fpdfsdk/fpdfxfa/cxfa_fwladaptertimermgr.h
index 3904ba5..fdb5635 100644
--- a/fpdfsdk/fpdfxfa/cxfa_fwladaptertimermgr.h
+++ b/fpdfsdk/fpdfxfa/cxfa_fwladaptertimermgr.h
@@ -11,8 +11,8 @@
 #include <vector>
 
 #include "fpdfsdk/fpdfxfa/cpdfxfa_context.h"
-#include "xfa/fwl/core/cfwl_timerinfo.h"
-#include "xfa/fwl/core/ifwl_adaptertimermgr.h"
+#include "xfa/fwl/cfwl_timerinfo.h"
+#include "xfa/fwl/ifwl_adaptertimermgr.h"
 
 class CXFA_FWLAdapterTimerMgr : public IFWL_AdapterTimerMgr {
  public: