Don't setStyle the RenderView every style recalc

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index 4a82628ee33ae7c50ae1286d4ab1e0de5ac82c0a..5ace3c2e4869b020422316f36217e6582dcc8271 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -3375,6 +3375,8 @@ bool WebViewImpl::isTransparent() const
 
 void WebViewImpl::setBaseBackgroundColor(WebColor color)
 {
+    layout();

[ojan, 2014/03/03 03:30:52]

Why was this change needed?

[abarth-chromium, 2014/03/03 03:50:12]

The call to setBaseBackgroundColor on line 3386 depends on compositing
information.  Previously, the unit test for this function, we just happened to
have clean compositing state.  After the other parts of this change, the unit
test triggers a chicken/egg assert.  Given that this API can be called at any
time, it seems like we need to clean out the compositing state.  An alternative
would be to delay actually setting the background color until the next
compositing update.

+
     if (m_baseBackgroundColor == color)
         return;