Enable AutoResize for Constrained Web Dialogs

chrome/browser/ui/webui/constrained_web_dialog_ui.h

Index: chrome/browser/ui/webui/constrained_web_dialog_ui.h
diff --git a/chrome/browser/ui/webui/constrained_web_dialog_ui.h b/chrome/browser/ui/webui/constrained_web_dialog_ui.h
index 172fab6b2c623a89f0fc471c8a9eedd92d317e0a..bc09ebaedd2c10b7b49f57db71530372f6ea60ea 100644
--- a/chrome/browser/ui/webui/constrained_web_dialog_ui.h
+++ b/chrome/browser/ui/webui/constrained_web_dialog_ui.h
@@ -10,6 +10,10 @@
 #include "content/public/browser/web_ui_controller.h"
 #include "ui/gfx/native_widget_types.h"
 
+namespace gfx {
+class Size;
+}
+
 namespace content {
 class BrowserContext;
 class RenderViewHost;
@@ -41,6 +45,14 @@ class ConstrainedWebDialogDelegate {
   // Returns the native type used to display the dialog.
   virtual web_modal::NativeWebContentsModalDialog GetNativeDialog() = 0;
 
+  // Returns the minimum size for the dialog.
+  virtual gfx::Size GetMinimumSize() const = 0;
+
+  // Returns the maximum size for the dialog.
+  virtual gfx::Size GetMaximumSize() const = 0;
+
+  virtual gfx::Size GetPreferredSize() const = 0;
+
  protected:
   virtual ~ConstrainedWebDialogDelegate() {}
 };
@@ -75,16 +87,31 @@ class ConstrainedWebDialogUI : public content::WebUIController {
   DISALLOW_COPY_AND_ASSIGN(ConstrainedWebDialogUI);
 };
 
-// Create a constrained HTML dialog. The actual object that gets created
-// is a ConstrainedWebDialogDelegate, which later triggers construction of a
-// ConstrainedWebDialogUI object.
+// Create and show a constrained HTML dialog. The actual object that gets
+// created is a ConstrainedWebDialogDelegate, which later triggers construction
+// of a ConstrainedWebDialogUI object.
 // |browser_context| is used to construct the constrained HTML dialog's
 //                   WebContents.
 // |delegate| controls the behavior of the dialog.
 // |overshadowed| is the tab being overshadowed by the dialog.
-ConstrainedWebDialogDelegate* CreateConstrainedWebDialog(
+ConstrainedWebDialogDelegate* ShowConstrainedWebDialog(
     content::BrowserContext* browser_context,
     ui::WebDialogDelegate* delegate,
     content::WebContents* overshadowed);
 
+// Create a constrained HTML dialog with auto-resize enabled. The dialog
+// is shown by calling constrained_window::ShowModalDialogViews() after
+// document load has completed to avoid UI jankiness.
+// |browser_context| is used to construct the dialog's WebContents.
+// |delegate| controls the behavior of the dialog.
+// |overshadowed| is the tab being overshadowed by the dialog.
+// |min_size| is the minimum size of the dialog.
+// |max_size| is the maximum size of the dialog.
+ConstrainedWebDialogDelegate* CreateConstrainedWebDialogWithAutoResize(
+    content::BrowserContext* browser_context,
+    ui::WebDialogDelegate* delegate,
+    content::WebContents* overshadowed,
+    const gfx::Size& min_size,
+    const gfx::Size& max_size);
+
 #endif  // CHROME_BROWSER_UI_WEBUI_CONSTRAINED_WEB_DIALOG_UI_H_