Add flag to enable immersive fullscreen for v2 apps

apps/shell_window.cc

Index: apps/shell_window.cc
diff --git a/apps/shell_window.cc b/apps/shell_window.cc
index 7eff4cea9f50ad8307c176f29f3bbcc3a8ca8a31..0f626ab21a3bab266ebc3a70197a8e881828fd7f 100644
--- a/apps/shell_window.cc
+++ b/apps/shell_window.cc
@@ -141,8 +141,7 @@ ShellWindow::ShellWindow(Profile* profile,
       window_type_(WINDOW_TYPE_DEFAULT),
       delegate_(delegate),
       image_loader_ptr_factory_(this),
-      fullscreen_for_window_api_(false),
-      fullscreen_for_tab_(false),
+      fullscreen_type_(FULLSCREEN_TYPE_NONE),
       show_on_first_paint_(false),
       first_paint_complete_(false) {
 }
@@ -404,8 +403,12 @@ void ShellWindow::Fullscreen() {
   if (!profile()->GetPrefs()->GetBoolean(prefs::kAppFullscreenAllowed))
     return;
 #endif
-  fullscreen_for_window_api_ = true;
-  GetBaseWindow()->SetFullscreen(true);
+  bool tab_fullscreen =
+     (fullscreen_type_ == FULLSCREEN_TYPE_TAB ||
+      fullscreen_type_ == FULLSCREEN_TYPE_WINDOW_AND_TAB);
+  fullscreen_type_ = tab_fullscreen ?
+      FULLSCREEN_TYPE_WINDOW_AND_TAB : FULLSCREEN_TYPE_WINDOW;
+  GetBaseWindow()->SetFullscreen(fullscreen_type_);
 }
 
 void ShellWindow::Maximize() {
@@ -417,15 +420,28 @@ void ShellWindow::Minimize() {
 }
 
 void ShellWindow::Restore() {
-  fullscreen_for_window_api_ = false;
-  fullscreen_for_tab_ = false;
-  if (GetBaseWindow()->IsFullscreenOrPending()) {
-    GetBaseWindow()->SetFullscreen(false);
+  if (fullscreen_type_ != FULLSCREEN_TYPE_NONE) {
+    fullscreen_type_ = FULLSCREEN_TYPE_NONE;
+    GetBaseWindow()->SetFullscreen(fullscreen_type_);
   } else {
     GetBaseWindow()->Restore();
   }
 }
 
+void ShellWindow::ImmersiveFullscreen() {
+#if !defined(OS_MACOSX)
+  // Do not enter fullscreen mode if disallowed by pref.
+  if (!profile()->GetPrefs()->GetBoolean(prefs::kAppFullscreenAllowed))
+    return;
+#endif
+  if (GetBaseWindow()->SupportsImmersiveFullscreen()) {
+    fullscreen_type_ = FULLSCREEN_TYPE_IMMERSIVE;
+    GetBaseWindow()->SetFullscreen(fullscreen_type_);
+  } else {
+    Fullscreen();
+  }
+}
+
 void ShellWindow::SetMinimumSize(const gfx::Size& min_size) {
   size_constraints_.set_minimum_size(min_size);
   OnSizeConstraintsChanged();
@@ -585,18 +601,23 @@ void ShellWindow::ToggleFullscreenModeForTab(content::WebContents* source,
     return;
   }
 
-  fullscreen_for_tab_ = enter_fullscreen;
-
+  bool window_fullscreen =
+      (fullscreen_type_ == FULLSCREEN_TYPE_WINDOW ||
+       fullscreen_type_ == FULLSCREEN_TYPE_WINDOW_AND_TAB);
   if (enter_fullscreen) {
-    native_app_window_->SetFullscreen(true);
-  } else if (!fullscreen_for_window_api_) {
-    native_app_window_->SetFullscreen(false);
+    fullscreen_type_ = window_fullscreen ?
+        FULLSCREEN_TYPE_WINDOW_AND_TAB : FULLSCREEN_TYPE_TAB;
+  } else {
+    fullscreen_type_ = window_fullscreen ?
+        FULLSCREEN_TYPE_WINDOW : FULLSCREEN_TYPE_NONE;
   }
+  GetBaseWindow()->SetFullscreen(fullscreen_type_);
 }
 
 bool ShellWindow::IsFullscreenForTabOrPending(
     const content::WebContents* source) const {
-  return fullscreen_for_tab_;
+  return (fullscreen_type_ == FULLSCREEN_TYPE_TAB ||
+          fullscreen_type_ == FULLSCREEN_TYPE_WINDOW_AND_TAB);
 }
 
 void ShellWindow::Observe(int type,