Don't draw contents to evas image when being background.

[Title] Don't draw contents to evas image when being background.
[Issue#] N_SE-46030
[Problem] Web Contents is flikering when being foreground.
[Cause] When being background, Blank page is drawed to evas image.
[Solution] Don't draw contents to evas image in background.

Change-Id: I23bdfd983bb8a31c04aea8ad0a70afa4014d053c

diff --git a/Source/WebKit2/UIProcess/API/efl/PageClientImpl.cpp b/Source/WebKit2/UIProcess/API/efl/PageClientImpl.cpp
index 0c28a54..b9d11a1 100755 (executable)
--- a/Source/WebKit2/UIProcess/API/efl/PageClientImpl.cpp
+++ b/Source/WebKit2/UIProcess/API/efl/PageClientImpl.cpp
@@ -1550,7 +1550,7 @@ void PageClientEvasGL::displayViewport()
 
 void PageClientEvasGL::drawContents()
 {
-    if (!drawingArea() || !(drawingArea()->layerTreeCoordinatorProxy()))
+    if (!drawingArea() || !(drawingArea()->layerTreeCoordinatorProxy()) || !m_isVisible)
         return;
 
     WebLayerTreeRenderer* renderer = drawingArea()->layerTreeCoordinatorProxy()->layerTreeRenderer();