Prevent the user from triggering multiple copies of a particular exceptions window.

BUG=34692
TEST=Open the content settings dialog to any page, hit "Exceptions", move the exceptions window and hit "Exceptions" again; we shouldn't spawn another window.
Review URL: http://codereview.chromium.org/596020

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@38516 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/views/options/exceptions_view.cc

@@ -18,16 +18,24 @@
 #include "views/window/window.h"
 
 static const int kExceptionsViewInsetSize = 5;
+static ExceptionsView* instances[CONTENT_SETTINGS_NUM_TYPES] = { NULL };
 
 // static
 void ExceptionsView::ShowExceptionsWindow(gfx::NativeWindow parent,
                                           HostContentSettingsMap* map,
-                                          ContentSettingsType type) {
-  views::Window::CreateChromeWindow(
-      parent, gfx::Rect(), new ExceptionsView(map, type))->Show();
+                                          ContentSettingsType content_type) {
+  if (!instances[content_type]) {
+    instances[content_type] = new ExceptionsView(map, content_type);
+    views::Window::CreateChromeWindow(parent, gfx::Rect(),
+                                      instances[content_type]);
+  }
+
+  // This will show invisible windows and bring visible windows to the front.
+  instances[content_type]->window()->Show();
 }
 
 ExceptionsView::~ExceptionsView() {
+  instances[model_.content_type()] = NULL;
   table_->SetModel(NULL);
 }
 

chrome/browser/views/options/exceptions_view.h

@@ -38,7 +38,7 @@ class ExceptionsView : public ExceptionEditorView::Delegate,
   // Shows the Exceptions window.
   static void ShowExceptionsWindow(gfx::NativeWindow parent,
                                    HostContentSettingsMap* map,
-                                   ContentSettingsType type);
+                                   ContentSettingsType content_type);
 
   virtual ~ExceptionsView();