Added Pin/Unpin button to the App Info Dialog on ChromeOS

chrome/browser/ui/views/apps/app_info_dialog/app_info_footer_panel.cc

Index: chrome/browser/ui/views/apps/app_info_dialog/app_info_footer_panel.cc
diff --git a/chrome/browser/ui/views/apps/app_info_dialog/app_info_footer_panel.cc b/chrome/browser/ui/views/apps/app_info_dialog/app_info_footer_panel.cc
index db66d64f5bab82693280673993df471fdaa0840f..bea3081e315705b24230126f50881bd0392d9bc2 100644
--- a/chrome/browser/ui/views/apps/app_info_dialog/app_info_footer_panel.cc
+++ b/chrome/browser/ui/views/apps/app_info_dialog/app_info_footer_panel.cc
@@ -4,9 +4,13 @@
 
 #include "chrome/browser/ui/views/apps/app_info_dialog/app_info_footer_panel.h"
 
+#include "ash/shelf/shelf_delegate.h"
+#include "ash/shell.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/app_list/app_list_controller_delegate.h"
 #include "chrome/browser/ui/browser_dialogs.h"
+#include "chrome/browser/ui/host_desktop.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/browser/management_policy.h"
 #include "extensions/common/extension.h"
@@ -19,10 +23,14 @@
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
 
-AppInfoFooterPanel::AppInfoFooterPanel(Profile* profile,
+AppInfoFooterPanel::AppInfoFooterPanel(gfx::NativeWindow parent_window,
+                                       Profile* profile,
                                        const extensions::Extension* app)
     : AppInfoPanel(profile, app),
+      parent_window_(parent_window),
       create_shortcuts_button_(NULL),
+      pin_to_shelf_button_(NULL),
+      unpin_from_shelf_button_(NULL),
       remove_button_(NULL),
       weak_ptr_factory_(this) {
   CreateButtons();
@@ -47,6 +55,15 @@ void AppInfoFooterPanel::CreateButtons() {
     create_shortcuts_button_->SetStyle(views::Button::STYLE_BUTTON);
   }
 
+  if (CanSetPinnedToShelf()) {
+    pin_to_shelf_button_ = new views::LabelButton(
+        this, l10n_util::GetStringUTF16(IDS_APP_LIST_CONTEXT_MENU_PIN));
+    pin_to_shelf_button_->SetStyle(views::Button::STYLE_BUTTON);
+    unpin_from_shelf_button_ = new views::LabelButton(
+        this, l10n_util::GetStringUTF16(IDS_APP_LIST_CONTEXT_MENU_UNPIN));
+    unpin_from_shelf_button_->SetStyle(views::Button::STYLE_BUTTON);
+  }
+
   if (CanUninstallApp()) {
     remove_button_ = new views::LabelButton(
         this,
@@ -59,14 +76,33 @@ void AppInfoFooterPanel::LayoutButtons() {
   if (create_shortcuts_button_)
     AddChildView(create_shortcuts_button_);
 
+  if (pin_to_shelf_button_)
+    AddChildView(pin_to_shelf_button_);
+  if (unpin_from_shelf_button_)
+    AddChildView(unpin_from_shelf_button_);
+  UpdatePinButtons();
+
   if (remove_button_)
     AddChildView(remove_button_);
 }
 
+void AppInfoFooterPanel::UpdatePinButtons() {
+  if (pin_to_shelf_button_ && unpin_from_shelf_button_) {
+    bool is_pinned =
+        !ash::Shell::GetInstance()->GetShelfDelegate()->IsAppPinned(app_->id());
+    pin_to_shelf_button_->SetVisible(is_pinned);
+    unpin_from_shelf_button_->SetVisible(!is_pinned);
+  }
+}
+
 void AppInfoFooterPanel::ButtonPressed(views::Button* sender,
                                        const ui::Event& event) {
   if (sender == create_shortcuts_button_) {
     CreateShortcuts();
+  } else if (sender == pin_to_shelf_button_) {
+    SetPinnedToShelf(true);
+  } else if (sender == unpin_from_shelf_button_) {
+    SetPinnedToShelf(false);
   } else if (sender == remove_button_) {
     UninstallApp();
   } else {
@@ -96,12 +132,31 @@ void AppInfoFooterPanel::CreateShortcuts() {
 }
 
 bool AppInfoFooterPanel::CanCreateShortcuts() const {
-// ChromeOS can pin apps to the app launcher, but can't create shortcuts.
-#if defined(OS_CHROMEOS)
-  return false;
-#else
-  return true;
-#endif
+  // Ash platforms can't create shortcuts.
+  return (chrome::GetHostDesktopTypeForNativeWindow(parent_window_) !=
+          chrome::HOST_DESKTOP_TYPE_ASH);
+}
+
+void AppInfoFooterPanel::SetPinnedToShelf(bool value) {
+  DCHECK(CanSetPinnedToShelf());
+  ash::ShelfDelegate* shelf_delegate =
+      ash::Shell::GetInstance()->GetShelfDelegate();
+  DCHECK(shelf_delegate);
+  if (value)
+    shelf_delegate->PinAppWithID(app_->id());
+  else
+    shelf_delegate->UnpinAppWithID(app_->id());
+
+  UpdatePinButtons();
+  Layout();
+}
+
+bool AppInfoFooterPanel::CanSetPinnedToShelf() const {
+  // Non-Ash platforms don't have a shelf.
+  if (chrome::GetHostDesktopTypeForNativeWindow(parent_window_) !=
+      chrome::HOST_DESKTOP_TYPE_ASH)
+    return false;
+  return ash::Shell::GetInstance()->GetShelfDelegate()->CanPin();
 }
 
 void AppInfoFooterPanel::UninstallApp() {