Made launcher hidden when kicking off chrome in app mode.

chrome/browser/ui/ash/launcher/chrome_launcher_controller_per_app.cc

Index: chrome/browser/ui/ash/launcher/chrome_launcher_controller_per_app.cc
diff --git a/chrome/browser/ui/ash/launcher/chrome_launcher_controller_per_app.cc b/chrome/browser/ui/ash/launcher/chrome_launcher_controller_per_app.cc
index 207f51b85e7b6d1004f3e80a85c0bf6f779317c6..b81f14f623103c51671bf562a5d135e04beebd52 100644
--- a/chrome/browser/ui/ash/launcher/chrome_launcher_controller_per_app.cc
+++ b/chrome/browser/ui/ash/launcher/chrome_launcher_controller_per_app.cc
@@ -45,6 +45,7 @@
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/browser/web_applications/web_app.h"
 #include "chrome/common/chrome_notification_types.h"
+#include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_resource.h"
 #include "chrome/common/pref_names.h"
@@ -631,6 +632,13 @@ Profile* ChromeLauncherControllerPerApp::profile() {
 ash::ShelfAutoHideBehavior
     ChromeLauncherControllerPerApp::GetShelfAutoHideBehavior(
         aura::RootWindow* root_window) const {
+  // Don't show the shelf in app mode.
+  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  if (command_line->HasSwitch(switches::kAppId) &&
+      command_line->HasSwitch(switches::kForceAppMode)) {
+    return ash::SHELF_AUTO_HIDE_ALWAYS_HIDDEN;
+  }
+
   // See comment in |kShelfAlignment| as to why we consider two prefs.
   const std::string behavior_value(
       GetPrefForRootWindow(profile_->GetPrefs(),
@@ -1202,6 +1210,10 @@ void ChromeLauncherControllerPerApp::SetShelfAutoHideBehaviorPrefs(
     case ash::SHELF_AUTO_HIDE_BEHAVIOR_NEVER:
       value = ash::kShelfAutoHideBehaviorNever;
       break;
+    case ash::SHELF_AUTO_HIDE_ALWAYS_HIDDEN:
+      // This one should not be a valid preference option for now. We only want
+      // to completely hide it when we run app mode.

[oshima, 2013/01/30 00:28:31]

NOTREACHED()

[zel, 2013/01/30 01:01:34]

Done.

+      return;
   }
 
   UpdatePerDisplayPref(