Add empty MainFrame class
https://bugs.webkit.org/show_bug.cgi?id=121770

Reviewed by Andreas Kling.

Source/WebCore:

For now, MainFrame simply derives from Frame and adds nothing.
Next, we will make each Frame point back to its MainFrame.

* CMakeLists.txt: Added MainFrame.cpp/h.
* GNUmakefile.list.am: Ditto.
* Target.pri: Ditto.
* WebCore.exp.in: Ditto.
* WebCore.vcxproj/WebCore.vcxproj: Ditto.
* WebCore.vcxproj/WebCore.vcxproj.filters: Ditto.
* WebCore.xcodeproj/project.pbxproj: Ditto.

* page/Frame.cpp:
(WebCore::Frame::Frame): Use references instead of pointers for constructor.
(WebCore::Frame::create): Pass references instead of pointers to constructor.
* page/Frame.h: Made constructor protected instead of private, and marked
destructor virtual explicitly. Also marked virtual functions OVERRIDE and FINAL.

* page/MainFrame.cpp: Added.
* page/MainFrame.h: Added.

* page/Page.cpp:
(WebCore::Page::Page): Use MainFrame::create instead of Frame::create.
(WebCore::Page::frameIsMainFrame): Moved here, no longer inline.
(WebCore::Page::renderTreeSize): Use const Frame* instead of Frame*.
(WebCore::Page::checkSubframeCountConsistency): Ditto.
* page/Page.h: Changed mainFrame() to return MainFrame& and m_mainFrame to
be a RefPtr<MainFrame>.

* accessibility/mac/WebAccessibilityObjectWrapperMac.mm:
* bindings/js/PageScriptDebugServer.cpp:
* bindings/js/ScriptProfiler.cpp:
* bindings/js/ScriptState.cpp:
* css/MediaQueryEvaluator.cpp:
* dom/Document.cpp:
* history/CachedFrame.cpp:
* history/CachedPage.cpp:
* history/PageCache.cpp:
* html/HTMLPlugInImageElement.cpp:
* inspector/InspectorAgent.cpp:
* inspector/InspectorCanvasAgent.cpp:
* inspector/InspectorClient.cpp:
* inspector/InspectorDOMAgent.cpp:
* inspector/InspectorFrontendClientLocal.cpp:
* inspector/InspectorFrontendHost.cpp:
* inspector/InspectorInputAgent.cpp:
* inspector/InspectorInstrumentation.cpp:
* inspector/InspectorOverlay.cpp:
* inspector/InspectorPageAgent.cpp:
* inspector/PageRuntimeAgent.cpp:
* loader/FrameLoader.cpp:
* loader/HistoryController.cpp:
* loader/archive/mhtml/MHTMLArchive.cpp:
* page/AutoscrollController.cpp:
* page/Chrome.cpp:
* page/ContextMenuController.cpp:
* page/DOMWindow.cpp:
* page/DragController.cpp:
* page/EventHandler.cpp:
* page/FocusController.cpp:
* page/FrameTree.cpp:
* page/FrameView.cpp:
* page/GestureTapHighlighter.cpp:
* page/PageGroup.cpp:
* page/PageGroupLoadDeferrer.cpp:
* page/PageSerializer.cpp:
* page/PageThrottler.cpp:
* page/Settings.cpp:
* page/SpatialNavigation.cpp:
* page/mac/DragControllerMac.mm:
* page/mac/PageMac.cpp:
* page/scrolling/ScrollingCoordinator.cpp:
* page/scrolling/mac/ScrollingCoordinatorMac.mm:
* platform/graphics/texmap/coordinated/CompositingCoordinator.cpp:
* plugins/DOMMimeType.cpp:
* storage/StorageEventDispatcher.cpp:
* svg/graphics/SVGImage.cpp:
* testing/InternalSettings.cpp:
* testing/Internals.cpp:
Include MainFrame.h instead of Frame.h as needed.

Source/WebKit/efl:

* WebCoreSupport/AcceleratedCompositingContextEfl.cpp:
* WebCoreSupport/InspectorClientEfl.cpp:
* ewk/ewk_view.cpp:
Include MainFrame.h instead of Frame.h as needed.

Source/WebKit/gtk:

* WebCoreSupport/AcceleratedCompositingContextGL.cpp:
* WebCoreSupport/ChromeClientGtk.cpp:
* WebCoreSupport/FrameLoaderClientGtk.cpp:
* WebCoreSupport/GtkAdjustmentWatcher.cpp:
* webkit/webkitwebframe.cpp:
* webkit/webkitwebview.cpp:
* webkit/webkitviewportattributes.cpp:
Include MainFrame.h instead of Frame.h as needed.

Source/WebKit/mac:

* WebCoreSupport/WebDragClient.mm:
* WebCoreSupport/WebInspectorClient.mm:
* WebCoreSupport/WebPlatformStrategies.mm:
* WebView/WebFrame.mm:
* WebView/WebHTMLView.mm:
* WebView/WebView.mm:
Include MainFrame.h instead of Frame.h as needed.

Source/WebKit/qt:

* Source/WebKit/qt/WebCoreSupport/InspectorClientQt.cpp:
* Source/WebKit/qt/WebCoreSupport/ChromeClientQt.cpp:
* Source/WebKit/qt/WebCoreSupport/QWebFrameAdapter.cpp:
* Source/WebKit/qt/WebCoreSupport/DumpRenderTreeSupportQt.cpp:
* Source/WebKit/qt/WebCoreSupport/FrameLoaderClientQt.cpp:
* Source/WebKit/qt/WebCoreSupport/QWebPageAdapter.cpp:
Include MainFrame.h instead of Frame.h as needed.

Source/WebKit/win:

* win/WebCoreSupport/WebDragClient.cpp:
* win/WebCoreSupport/WebContextMenuClient.cpp:
* win/WebDropSource.cpp:
* win/WebFrame.cpp:
* win/WebView.cpp:
Include MainFrame.h instead of Frame.h as needed.

Source/WebKit2:

* WebProcess/FullScreen/WebFullScreenManager.cpp:
* WebProcess/InjectedBundle/API/c/WKBundlePage.cpp:
* WebProcess/InjectedBundle/InjectedBundle.cpp:
* WebProcess/Plugins/PluginView.cpp:
* WebProcess/Storage/StorageAreaMap.cpp:
* WebProcess/WebCoreSupport/WebChromeClient.cpp:
* WebProcess/WebCoreSupport/WebContextMenuClient.cpp:
* WebProcess/WebCoreSupport/WebFrameLoaderClient.cpp:
* WebProcess/WebCoreSupport/WebPlatformStrategies.cpp:
* WebProcess/WebCoreSupport/mac/WebContextMenuClientMac.mm:
* WebProcess/WebPage/FindController.cpp:
* WebProcess/WebPage/PageOverlay.cpp:
* WebProcess/WebPage/WebInspector.cpp:
* WebProcess/WebPage/WebPage.cpp:
* WebProcess/WebPage/atk/WebPageAccessibilityObjectAtk.cpp:
* WebProcess/WebPage/gtk/LayerTreeHostGtk.cpp:
* WebProcess/WebPage/mac/LayerTreeHostMac.mm:
* WebProcess/WebPage/mac/RemoteLayerTreeContext.mm:
* WebProcess/WebPage/mac/TiledCoreAnimationDrawingArea.mm:
* WebProcess/WebPage/mac/WKAccessibilityWebPageObject.mm:
* WebProcess/WebPage/mac/WebPageMac.mm:
Include MainFrame.h instead of Frame.h as needed.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@156543 268f45cc-cd09-0410-ab3c-d52691b4dbfc
diff --git a/Source/WebCore/loader/FrameLoader.cpp b/Source/WebCore/loader/FrameLoader.cpp
index 4b78e4a..38d7ca5 100644
--- a/Source/WebCore/loader/FrameLoader.cpp
+++ b/Source/WebCore/loader/FrameLoader.cpp
@@ -60,7 +60,6 @@
 #include "FloatRect.h"
 #include "FormState.h"
 #include "FormSubmission.h"
-#include "Frame.h"
 #include "FrameLoadRequest.h"
 #include "FrameLoaderClient.h"
 #include "FrameNetworkingContext.h"
@@ -81,6 +80,7 @@
 #include "LoaderStrategy.h"
 #include "Logging.h"
 #include "MIMETypeRegistry.h"
+#include "MainFrame.h"
 #include "MemoryCache.h"
 #include "Page.h"
 #include "PageActivityAssertionToken.h"