[Escher] Remove App::runningApp

Change-Id: I4953bae09391079b77c93ee482c6e9cd8202c2d4

apps/graph/list/list_controller.cpp

@@ -34,7 +34,7 @@ void ListController::setActiveCell(int index) {
   m_tableView.scrollToRow(index);
   FunctionCell * cell = (FunctionCell *)(m_tableView.cellAtIndex(index));
   cell->setParentResponder(this);
-  App::runningApp()->focus(cell);
+  app()->focus(cell);
 }
 
 bool ListController::handleEvent(ion_event_t event) {

escher/include/escher/app.h

@@ -7,7 +7,6 @@
 class App : public Responder {
 public:
   App();
-  static App * runningApp();
   void run();
   void focus(Responder * responder);
 protected:

escher/src/app.cpp

@@ -4,8 +4,6 @@ extern "C" {
 #include <ion.h>
 }
 
-static App * sRunningApp = nullptr;
-
 App::App() :
   Responder(nullptr),
   m_focusedResponder(nullptr)
@@ -13,8 +11,6 @@ App::App() :
 }
 
 void App::run() {
-  sRunningApp = this;
-
   Window window;
   window.setFrame(KDRect(0, 0, ION_SCREEN_WIDTH, ION_SCREEN_HEIGHT));
   View * rootView = rootViewController()->view();
@@ -31,12 +27,6 @@ void App::run() {
     dispatchEvent(event);
     window.redraw();
   }
-
-  sRunningApp = nullptr;
-}
-
-App * App::runningApp() {
-  return sRunningApp;
 }
 
 void App::dispatchEvent(ion_event_t event) {

escher/src/tab_view_controller.cpp

@@ -110,7 +110,7 @@ void TabViewController::setActiveTab(uint8_t i) {
   m_view.m_tabView.setActiveIndex(i);
   m_activeChildIndex = i;
 
-  App::runningApp()->focus(activeVC);
+  app()->focus(activeVC);
 }
 
 View * TabViewController::view() {