Hook up Chrome's wallpaper picker for mash.

chrome/browser/chromeos/extensions/wallpaper_private_api.cc

Index: chrome/browser/chromeos/extensions/wallpaper_private_api.cc
diff --git a/chrome/browser/chromeos/extensions/wallpaper_private_api.cc b/chrome/browser/chromeos/extensions/wallpaper_private_api.cc
index 6e0f19be7c2df1bdf532af893a5833ba4d750da5..cca1d8bd61ab70e3b6ca5540cb8e21924f8b76c9 100644
--- a/chrome/browser/chromeos/extensions/wallpaper_private_api.cc
+++ b/chrome/browser/chromeos/extensions/wallpaper_private_api.cc
@@ -32,6 +32,7 @@
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
+#include "chrome/browser/ui/ash/ash_util.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/grit/generated_resources.h"
@@ -169,6 +170,11 @@ WindowStateManager* g_window_state_manager = NULL;
 // static
 void WindowStateManager::MinimizeInactiveWindows(
     const std::string& user_id_hash) {
+  if (chrome::IsRunningInMash()) {
+    NOTIMPLEMENTED();
+    return;
+  }
+
   if (!g_window_state_manager)
     g_window_state_manager = new WindowStateManager();
   g_window_state_manager->BuildWindowListAndMinimizeInactiveForUser(
@@ -177,6 +183,11 @@ void WindowStateManager::MinimizeInactiveWindows(
 
 // static
 void WindowStateManager::RestoreWindows(const std::string& user_id_hash) {
+  if (chrome::IsRunningInMash()) {
+    NOTIMPLEMENTED();
+    return;
+  }
+
   if (!g_window_state_manager) {
     DCHECK(false) << "This should only be called after calling "
                   << "MinimizeInactiveWindows.";