Bug 1306332 - Don't set a maximum size on the native window if SetSizeConstraints is called with magical "unconstrained" values. r=karlt

MozReview-Commit-ID: DdHrNjmxHQJ

--HG--
extra : rebase_source : 23df78e62082691ce9a73535a24114c91c365dfe

widget/gtk/nsWindow.cpp

@@ -1044,7 +1044,14 @@ void nsWindow::SetSizeConstraints(const SizeConstraints& aConstraints)
         geometry.max_height = DevicePixelsToGdkCoordRoundDown(
                               mSizeConstraints.mMaxSize.height);
 
-        uint32_t hints = GDK_HINT_MIN_SIZE | GDK_HINT_MAX_SIZE;
+        uint32_t hints = 0;
+        if (aConstraints.mMinSize != LayoutDeviceIntSize(0, 0)) {
+            hints |= GDK_HINT_MIN_SIZE;
+        }
+        if (aConstraints.mMaxSize !=
+            LayoutDeviceIntSize(NS_MAXSIZE, NS_MAXSIZE)) {
+            hints |= GDK_HINT_MAX_SIZE;
+        }
         gtk_window_set_geometry_hints(GTK_WINDOW(mShell), nullptr,
                                       &geometry, GdkWindowHints(hints));
     }