Don't resume commits after every layout.

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index 799e600dc5c88da71cd989b129d96abdcc2e5bb2..d8656d6eebae75568f19bd5519ed71be85da2918 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -3884,6 +3884,15 @@ void WebViewImpl::willInsertBody(WebLocalFrameImpl* webframe)
         resumeTreeViewCommits();
 }
 
+void WebViewImpl::didFinishDocumentLoad(WebLocalFrameImpl* webframe)
+{
+    if (webframe != mainFrameImpl())
+        return;
+    // If we finished parsing and there's no sheets to load start painting.
+    if (webframe->frame()->document()->isRenderingReady())
+        resumeTreeViewCommits();
+}
+
 void WebViewImpl::didRemoveAllPendingStylesheet(WebLocalFrameImpl* webframe)
 {
     if (webframe != mainFrameImpl())
@@ -3915,10 +3924,6 @@ void WebViewImpl::layoutUpdated(WebLocalFrameImpl* webframe)
     if (!m_client || !webframe->frame()->isLocalRoot())
         return;
 
-    // If we finished a layout while in deferred commit mode,
-    // that means it's time to start producing frames again so un-defer.
-    resumeTreeViewCommits();
-
     if (m_shouldAutoResize && webframe->frame() && webframe->frame()->view()) {
         WebSize frameSize = webframe->frame()->view()->frameRect().size();
         if (frameSize != m_size) {