Add a new resizer corner overlay.

chrome/browser/tab_contents/tab_contents_delegate.h

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_DELEGATE_H_
 #define CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_DELEGATE_H_
 
 #include "base/basictypes.h"
+#include "base/gfx/rect.h"
 #include "chrome/browser/tab_contents/page_navigator.h"
 #include "chrome/common/navigation_types.h"
 
-namespace gfx {
-class Point;
-class Rect;
-}
-
 class TabContents;
 class HtmlDialogContentsDelegate;
 
 // Objects implement this interface to get notified about changes in the
 // TabContents and to provide necessary functionality.
 class TabContentsDelegate : public PageNavigator {
  public:
   // Opens a new URL inside the passed in TabContents, if source is 0 open
   // in the current front-most tab.
   virtual void OpenURLFromTab(TabContents* source,
                               const GURL& url, const GURL& referrer,
                               WindowOpenDisposition disposition,
                               PageTransition::Type transition) = 0;
 
   virtual void OpenURL(const GURL& url, const GURL& referrer,
                        WindowOpenDisposition disposition,
-                       PageTransition::Type transition)
-  {
+                       PageTransition::Type transition) {
     OpenURLFromTab(NULL, url, referrer, disposition, transition);
   }
 
   // Called to inform the delegate that the tab content's navigation state
   // changed. The |changed_flags| indicates the parts of the navigation state
   // that have been updated, and is any combination of the
   // |TabContents::InvalidateTypes| bits.
   virtual void NavigationStateChanged(const TabContents* source,
                                       unsigned changed_flags) = 0;
 
@@ skipping 54 matching lines @@
   virtual void ContentsZoomChange(bool zoom_in) { }
 
   // Check whether this contents is inside a window dedicated to running a web
   // application.
   virtual bool IsApplication() { return false; }
 
   // Detach the given tab and convert it to a "webapp" view.  The tab must be
   // a WebContents with a valid WebApp set.
   virtual void ConvertContentsToApplication(TabContents* source) { }
 
-  // Informs the TabContentsDelegate that some of our state has changed 
+  // Informs the TabContentsDelegate that some of our state has changed
   // for this tab.
   virtual void ContentsStateChanged(TabContents* source) {}
 
   // Return whether this tab contents should have a URL bar. Only web contents
   // opened with a minimal chrome and their popups can be displayed without a
   // URL bar.
   virtual bool ShouldDisplayURLField() { return true; }
 
   // Whether this tab can be blurred through a javascript obj.blur()
   // call. ConstrainedWindows shouldn't be able to be blurred.
   virtual bool CanBlur() const { return true; }
 
+  // Return the rect where to display the resize corner, if any, otherwise
+  // an empty rect.
+  virtual gfx::Rect GetRootWindowResizerRect() const { return gfx::Rect(); }
+
   // Show a dialog with HTML content. |delegate| contains a pointer to the
   // delegate who knows how to display the dialog (which file URL and JSON
   // string input to use during initialization). |parent_window| is the window
   // that should be parent of the dialog, or NULL for the default.
   virtual void ShowHtmlDialog(HtmlDialogContentsDelegate* delegate,
                               void* parent_window) { }
 
   // Tells us that we've finished firing this tab's beforeunload event.
   // The proceed bool tells us whether the user chose to proceed closing the
   // tab. Returns true if the tab can continue on firing it's unload event.
-  // If we're closing the entire browser, then we'll want to delay firing 
+  // If we're closing the entire browser, then we'll want to delay firing
   // unload events until all the beforeunload events have fired.
   virtual void BeforeUnloadFired(TabContents* tab,
-                                 bool proceed, 
-                                 bool* proceed_to_fire_unload) { 
+                                 bool proceed,
+                                 bool* proceed_to_fire_unload) {
     *proceed_to_fire_unload = true;
   }
 
   // Send IPC to external host. Default implementation is do nothing.
   virtual void ForwardMessageToExternalHost(const std::string& receiver,
-                                            const std::string& message) {};
+                                            const std::string& message) {}
 
   // If the delegate is hosting tabs externally.
   virtual bool IsExternalTabContainer() const { return false; }
 
   // Sets focus to the location bar or some other place that is appropriate.
   // This is called when the tab wants to encourage user input, like for the
   // new tab page.
   virtual void SetFocusToLocationBar() {}
 };
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_DELEGATE_H_