Created min size for print preview dialog and modified to allow the

components/constrained_window/constrained_window_views.cc

Index: components/constrained_window/constrained_window_views.cc
diff --git a/components/constrained_window/constrained_window_views.cc b/components/constrained_window/constrained_window_views.cc
index 3ed86ce06852a9da707d5868000e19a7103a8b7d..f9341214bfa683d7f98c9e5cc3e570768b7e76a6 100644
--- a/components/constrained_window/constrained_window_views.cc
+++ b/components/constrained_window/constrained_window_views.cc
@@ -5,6 +5,9 @@
 #include "components/constrained_window/constrained_window_views.h"
 
 #include <algorithm>
+#if defined(OS_MACOSX)
+#include <utility>
+#endif
 
 #include "base/macros.h"
 #include "build/build_config.h"
@@ -18,6 +21,12 @@
 #include "ui/views/widget/widget_observer.h"
 #include "ui/views/window/dialog_delegate.h"
 
+#if defined(USE_AURA)
+#include "ui/aura/window.h"
+#include "ui/wm/core/window_modality_controller.h"
+#include "ui/wm/core/window_util.h"
+#endif
+
 #if defined(OS_MACOSX)
 #import "components/constrained_window/native_web_contents_modal_dialog_manager_views_mac.h"
 #endif
@@ -111,6 +120,19 @@ void UpdateModalDialogPosition(views::Widget* widget,
   if (widget->is_top_level())
     position += host_widget->GetClientAreaBoundsInScreen().OffsetFromOrigin();
 
+#if defined(USE_AURA)
+  // Prevents widgets that extend outside the parent window from having their
+  // horizontal position centered on the center of the parent window. Instead,
+  // positions top left corner in parent top left corner so widget extends
+  // below and to the right of the parent window.
+  if (widget->GetNativeWindowProperty(wm::kAllowTransientParentEventsKey)) {
+    gfx::Rect bound = dialog_host->GetHostView()->GetBoundsInScreen();
+    if (bound.width() - border->GetInsets().left() < size.width()) {
+      position.set_x(position.x() + (size.width() - bound.width()) / 2 +
+                     border->GetInsets().left());
+    }
+  }
+#endif
   widget->SetBounds(gfx::Rect(position, size));
 }
 
@@ -135,7 +157,14 @@ void UpdateWebContentsModalDialogPosition(
   // Border may be null during widget initialization.
   if (border)
     max_size.Enlarge(0, border->GetInsets().top());
-  size.SetToMin(max_size);
+#if defined(USE_AURA)
+  bool has_independent_bounds =
+      !!(widget->GetNativeWindowProperty(wm::kAllowTransientParentEventsKey));
+#else
+  bool has_independent_bounds = false;
+#endif
+  if (!has_independent_bounds)
+    size.SetToMin(max_size);
   UpdateModalDialogPosition(widget, dialog_host, size);
 }
 
@@ -154,13 +183,39 @@ content::WebContents* GetTopLevelWebContents(
 views::Widget* ShowWebModalDialogViews(
     views::WidgetDelegate* dialog,
     content::WebContents* initiator_web_contents) {
+  LOG(ERROR) << "2 arg show modal dialog";
+  return ShowWebModalDialogViews(dialog, initiator_web_contents, nullptr);
+}
+
+views::Widget* ShowWebModalDialogViews(
+    views::WidgetDelegate* dialog,
+    content::WebContents* initiator_web_contents,
+    ui::AcceleratorTarget* target) {
   DCHECK(constrained_window_views_client);
   // For embedded WebContents, use the embedder's WebContents for constrained
   // window.
+
+  LOG(ERROR) << "3 arg show modal dialog, target = " << target;
   content::WebContents* web_contents =
       GetTopLevelWebContents(initiator_web_contents);
-  views::Widget* widget = CreateWebModalDialogViews(dialog, web_contents);
-  ShowModalDialog(widget->GetNativeWindow(), web_contents);
+  views::Widget* widget = nullptr;
+  if (dialog->GetModalType() == ui::MODAL_TYPE_CHILD) {
+    widget = CreateWebModalDialogViews(dialog, web_contents);
+    ShowModalDialog(widget->GetNativeWindow(), web_contents);
+  } else {
+  // This is a top level dialog with child modal dialog behavior.
+#if defined(OS_WIN)
+    gfx::NativeView parent_view = nullptr;
+#else
+    gfx::NativeWindow parent = web_contents->GetTopLevelNativeWindow();
+    gfx::NativeView parent_view =
+       parent ? constrained_window_views_client->GetDialogHostView(parent)
+               : nullptr;
+#endif
+    widget = views::DialogDelegate::CreateDialogWidget(
+        dialog, nullptr, parent_view);
+    ShowTopLevelModalDialog(widget->GetNativeWindow(), web_contents, target);
+  }
   return widget;
 }
 
@@ -232,4 +287,4 @@ views::Widget* CreateBrowserModalDialogViews(views::DialogDelegate* dialog,
   return widget;
 }
 
-}  // namespace constrained window
+}  // namespace constrained_window