Introduce WebFrameWidget to Blink

Source/web/ChromeClientImpl.cpp

Index: Source/web/ChromeClientImpl.cpp
diff --git a/Source/web/ChromeClientImpl.cpp b/Source/web/ChromeClientImpl.cpp
index 53816ce6c853c965aecf9b9e6c981b5cb51117d9..da93375b6c6ba06b6173dbe3f92bfd21ba64f2be 100644
--- a/Source/web/ChromeClientImpl.cpp
+++ b/Source/web/ChromeClientImpl.cpp
@@ -92,6 +92,7 @@
 #include "web/ExternalPopupMenu.h"
 #include "web/PopupMenuChromium.h"
 #include "web/WebFileChooserCompletionImpl.h"
+#include "web/WebFrameWidgetImpl.h"
 #include "web/WebInputEventConversion.h"
 #include "web/WebLocalFrameImpl.h"
 #include "web/WebPluginContainerImpl.h"
@@ -361,7 +362,7 @@ void ChromeClientImpl::setResizable(bool value)
 
 bool ChromeClientImpl::shouldReportDetailedMessageForSource(const String& url)
 {
-    WebLocalFrameImpl* webframe = m_webView->localFrameRootTemporary();
+    WebLocalFrameImpl* webframe = m_webView->mainFrameImpl();
     return webframe->client() && webframe->client()->shouldReportDetailedMessageForSource(url);
 }
 
@@ -492,8 +493,13 @@ void ChromeClientImpl::scheduleAnimation()
 
 void ChromeClientImpl::scheduleAnimationForFrame(LocalFrame* localRoot)
 {
-    // FIXME: This will proxy to a WebWidget attached to the WebLocalFrameImpl.
-    scheduleAnimation();
+    ASSERT(WebLocalFrameImpl::fromFrame(localRoot));
+    // If the frame is still being created, it might not yet have a WebWidget.
+    // FIXME: Is this the right thing to do? Is there a way to avoid having
+    // a local frame root that doesn't have a WebWidget? During initialization
+    // there is no content to draw so this call serves no purpose.
+    if (WebLocalFrameImpl::fromFrame(localRoot)->frameWidget())
+        WebLocalFrameImpl::fromFrame(localRoot)->frameWidget()->scheduleAnimation();
 }
 
 IntRect ChromeClientImpl::rootViewToScreen(const IntRect& rect) const
@@ -695,8 +701,21 @@ GraphicsLayerFactory* ChromeClientImpl::graphicsLayerFactory() const
 
 void ChromeClientImpl::attachRootGraphicsLayer(GraphicsLayer* rootLayer, LocalFrame* localRoot)
 {
-    // FIXME: Add call to frame's widget for non-zero frames.
-    m_webView->setRootGraphicsLayer(rootLayer);
+    // FIXME: For top-level frames we still use the WebView as a WebWidget. This special
+    // case will be removed when top-level frames get WebFrameWidgets.
+    if (localRoot->isMainFrame()) {
+        m_webView->setRootGraphicsLayer(rootLayer);
+    } else {
+        WebLocalFrameImpl* webFrame = WebLocalFrameImpl::fromFrame(localRoot);
+        // FIXME: The following conditional is only needed for staging until the Chromium patch
+        // lands that instantiates a WebFrameWidget.
+        if (!webFrame->frameWidget()) {
+            m_webView->setRootGraphicsLayer(rootLayer);
+            return;
+        }
+        ASSERT(webFrame && webFrame->frameWidget());
+        webFrame->frameWidget()->setRootGraphicsLayer(rootLayer);
+    }
 }
 
 void ChromeClientImpl::enterFullScreenForElement(Element* element)