Make createWindow (mostly) work with OOPIF

Source/core/page/Chrome.cpp

Index: Source/core/page/Chrome.cpp
diff --git a/Source/core/page/Chrome.cpp b/Source/core/page/Chrome.cpp
index a6f9cb7bae589cec26f3fc30fdbbacef8d153205..6de53ed3692ce411581bfe28662dc384baa22fbd 100644
--- a/Source/core/page/Chrome.cpp
+++ b/Source/core/page/Chrome.cpp
@@ -38,11 +38,13 @@
 #include "core/page/WindowFeatures.h"
 #include "platform/FileChooser.h"
 #include "platform/Logging.h"
+#include "platform/PlatformScreen.h"
 #include "platform/geometry/IntRect.h"
 #include "platform/network/NetworkHints.h"
 #include "public/platform/WebScreenInfo.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/Vector.h"
+#include <algorithm>
 
 namespace blink {
 
@@ -84,9 +86,23 @@ void Chrome::contentsSizeChanged(LocalFrame* frame, const IntSize& size) const
     m_client->contentsSizeChanged(frame, size);
 }
 
-void Chrome::setWindowRect(const IntRect& rect) const
+void Chrome::setWindowRect(const IntRect& pendingRect) const
 {
-    m_client->setWindowRect(rect);
+    IntRect screen = screenAvailableRect(*this);
+    IntRect window = pendingRect;
+
+    IntSize minimumSize = m_client->minimumWindowSize();
+    // Let size 0 pass through, since that indicates default size, not minimum size.
+    if (window.width())
+        window.setWidth(std::min(std::max(minimumSize.width(), window.width()), screen.width()));
+    if (window.height())
+        window.setHeight(std::min(std::max(minimumSize.height(), window.height()), screen.height()));
+
+    // Constrain the window position within the valid screen area.
+    window.setX(std::max(screen.x(), std::min(window.x(), screen.maxX() - window.width())));
+    window.setY(std::max(screen.y(), std::min(window.y(), screen.maxY() - window.height())));
+
+    m_client->setWindowRect(window);
 }
 
 IntRect Chrome::windowRect() const