Use IntRect instead of FloatRect for window positions and sizes

Source/platform/PlatformScreen.cpp

Index: Source/platform/PlatformScreen.cpp
diff --git a/Source/platform/PlatformScreen.cpp b/Source/platform/PlatformScreen.cpp
index 6c686578f1d4ad77efff359199419702f83bf3e2..60b2ee3b8ba9518e73b1c6e9692fb4594a4b9940 100644
--- a/Source/platform/PlatformScreen.cpp
+++ b/Source/platform/PlatformScreen.cpp
@@ -72,19 +72,19 @@ bool screenIsMonochrome(Widget* widget)
     return hostWindow->screenInfo().isMonochrome;
 }
 
-FloatRect screenRect(Widget* widget)
+IntRect screenRect(Widget* widget)
 {
     HostWindow* hostWindow = toHostWindow(widget);
     if (!hostWindow)
-        return FloatRect();
+        return IntRect();
     return IntRect(hostWindow->screenInfo().rect);
 }
 
-FloatRect screenAvailableRect(Widget* widget)
+IntRect screenAvailableRect(Widget* widget)
 {
     HostWindow* hostWindow = toHostWindow(widget);
     if (!hostWindow)
-        return FloatRect();
+        return IntRect();
     return IntRect(hostWindow->screenInfo().availableRect);
 }