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 62a1d75d8401b4a70e4a21cdebe2402aeb22a19c..37d1cd87b8f49e241498dde0a08006db829d4ed2 100644
--- a/chrome/browser/chromeos/extensions/wallpaper_private_api.cc
+++ b/chrome/browser/chromeos/extensions/wallpaper_private_api.cc
@@ -33,6 +33,7 @@
 #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"
@@ -170,6 +171,11 @@ 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(
@@ -178,6 +184,11 @@ 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.";