cros: Add strings for new wallpaper picker

The mock is at: goo.gl/kGgEVr

TBR=cpu@chromium.org

Bug: 811619
Change-Id: I1b3c773bae64031e47a9e7ab2aee65da9bb0c2f0
Reviewed-on: https://chromium-review.googlesource.com/922399
Commit-Queue: Wenzhao (Colin) Zang <wzang@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#537167}

chrome/app/chromeos_strings.grdp

@@ -20,21 +20,33 @@
   <message name="IDS_WALLPAPER_MANAGER_CUSTOM_CATEGORY_LABEL" desc="Wallpaper category label.">
     Custom
   </message>
+  <message name="IDS_WALLPAPER_MANAGER_MY_PHOTOS_CATEGORY_LABEL" desc="Wallpaper category label, the equivalent of the Custom category on the new wallpaper picker.">
+    My Photos
+  </message>
   <message name="IDS_WALLPAPER_MANAGER_SELECT_CUSTOM_LABEL" desc="Selects custom wallpaper label.">
     Custom Image:
   </message>
-  <message name="IDS_WALLPAPER_MANAGER_POSITION_LABEL" desc="Custom wallpaper position label">
+  <message name="IDS_WALLPAPER_MANAGER_POSITION_LABEL" desc="Custom wallpaper position label.">
     Position:
   </message>
   <message name="IDS_WALLPAPER_MANAGER_COLOR_LABEL" desc="Custom wallpaper color label.">
     Color:
   </message>
-  <message name="IDS_WALLPAPER_MANAGER_SHOW_CUSTOM_WALLPAPER_ON_START_WARNING" desc="The string displayed to user when set custom wallpaper">
+  <message name="IDS_WALLPAPER_MANAGER_REFRESH_LABEL" desc="The label of the refresh option in the top bar. Upon click, the wallpaper picker will fetch the online wallpapers again.">
+    Refresh
+  </message>
+  <message name="IDS_WALLPAPER_MANAGER_EXPLORE_LABEL" desc="The label of the explore option in the top bar. Upon click, a link with more information on the selected wallpaper will open.">
+    Explore
+  </message>
+  <message name="IDS_WALLPAPER_MANAGER_SHOW_CUSTOM_WALLPAPER_ON_START_WARNING" desc="The string displayed to user when set custom wallpaper.">
     Wallpapers appear on the Sign-in Screen.
   </message>
   <message name="IDS_WALLPAPER_MANAGER_SURPRISE_ME_LABEL" desc="Wallpaper surprise me checkbox label. If the checkbox is checked, Chrome will automatically change wallpaper to either a random one available in wallpaper picker or a google pushed wallpaper (surprise factor).">
     Surprise Me
   </message>
+  <message name="IDS_WALLPAPER_MANAGER_DAILY_REFRESH_LABEL" desc="Wallpaper daily refresh checkbox label. It is the equivalent of surprise me on the new wallpaper picker.">
+    Daily Refresh
+  </message>
   <message name="IDS_WALLPAPER_MANAGER_ACCESS_FAIL" desc="The string displayed to user when access wallpaper server failed.">
     Chrome cannot access wallpapers. Please connect to a network.
   </message>
@@ -50,6 +62,9 @@
   <message name="IDS_WALLPAPER_MANAGER_INVALID_WALLPAPER" desc="The string displayed to user when user selected wallpaper can not be set as a wallpaper.">
     Chrome cannot set wallpaper.
   </message>
+  <message name="IDS_WALLPAPER_MANAGER_NO_IMAGES_AVAILABLE" desc="The string displayed to user when there're no local files that can be used as wallpaper.">
+    No images available
+  </message>
   <message name="IDS_WALLPAPER_MANAGER_LAYOUT_CENTER" desc="Label for option to center a customized wallpaper.">
     Center
   </message>

chrome/browser/chromeos/extensions/wallpaper_private_api.cc

@@ -93,6 +93,11 @@ bool IsOEMDefaultWallpaper() {
       chromeos::switches::kDefaultWallpaperIsOem);
 }
 
+bool IsUsingNewWallpaperPicker() {
+  return base::CommandLine::ForCurrentProcess()->HasSwitch(
+      chromeos::switches::kNewWallpaperPicker);
+}
+
 // Saves |data| as |file_name| to directory with |key|. Return false if the
 // directory can not be found/created or failed to write file.
 bool SaveData(int key,
@@ -198,11 +203,15 @@ ExtensionFunction::ResponseAction WallpaperPrivateGetStringsFunction::Run() {
   SET_STRING("allCategoryLabel", IDS_WALLPAPER_MANAGER_ALL_CATEGORY_LABEL);
   SET_STRING("deleteCommandLabel", IDS_WALLPAPER_MANAGER_DELETE_COMMAND_LABEL);
   SET_STRING("customCategoryLabel",
-             IDS_WALLPAPER_MANAGER_CUSTOM_CATEGORY_LABEL);
+             IsUsingNewWallpaperPicker()
+                 ? IDS_WALLPAPER_MANAGER_MY_PHOTOS_CATEGORY_LABEL
+                 : IDS_WALLPAPER_MANAGER_CUSTOM_CATEGORY_LABEL);
   SET_STRING("selectCustomLabel",
              IDS_WALLPAPER_MANAGER_SELECT_CUSTOM_LABEL);
   SET_STRING("positionLabel", IDS_WALLPAPER_MANAGER_POSITION_LABEL);
   SET_STRING("colorLabel", IDS_WALLPAPER_MANAGER_COLOR_LABEL);
+  SET_STRING("refreshLabel", IDS_WALLPAPER_MANAGER_REFRESH_LABEL);
+  SET_STRING("exploreLabel", IDS_WALLPAPER_MANAGER_EXPLORE_LABEL);
   SET_STRING("centerCroppedLayout",
              IDS_WALLPAPER_MANAGER_LAYOUT_CENTER_CROPPED);
   SET_STRING("centerLayout", IDS_WALLPAPER_MANAGER_LAYOUT_CENTER);
@@ -214,7 +223,10 @@ ExtensionFunction::ResponseAction WallpaperPrivateGetStringsFunction::Run() {
              IDS_WALLPAPER_MANAGER_SHOW_CUSTOM_WALLPAPER_ON_START_WARNING);
   SET_STRING("accessFileFailure", IDS_WALLPAPER_MANAGER_ACCESS_FILE_FAILURE);
   SET_STRING("invalidWallpaper", IDS_WALLPAPER_MANAGER_INVALID_WALLPAPER);
-  SET_STRING("surpriseMeLabel", IDS_WALLPAPER_MANAGER_SURPRISE_ME_LABEL);
+  SET_STRING("noImagesAvailable", IDS_WALLPAPER_MANAGER_NO_IMAGES_AVAILABLE);
+  SET_STRING("surpriseMeLabel", IsUsingNewWallpaperPicker()
+                                    ? IDS_WALLPAPER_MANAGER_DAILY_REFRESH_LABEL
+                                    : IDS_WALLPAPER_MANAGER_SURPRISE_ME_LABEL);
   SET_STRING("learnMore", IDS_LEARN_MORE);
   SET_STRING("currentWallpaperSetByMessage",
              IDS_CURRENT_WALLPAPER_SET_BY_MESSAGE);
@@ -245,9 +257,7 @@ ExtensionFunction::ResponseAction WallpaperPrivateGetStringsFunction::Run() {
   dict->SetBoolean("isOEMDefaultWallpaper", IsOEMDefaultWallpaper());
   dict->SetString("canceledWallpaper",
                   wallpaper_api_util::kCancelWallpaperMessage);
-  dict->SetBoolean("useNewWallpaperPicker",
-                   base::CommandLine::ForCurrentProcess()->HasSwitch(
-                       chromeos::switches::kNewWallpaperPicker));
+  dict->SetBoolean("useNewWallpaperPicker", IsUsingNewWallpaperPicker());
 
   bool show_backdrop_wallpapers = false;
 #if defined(GOOGLE_CHROME_BUILD)