Add the Play Store app search to the launcher.

components/arc/common/app.mojom

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
-// Next MinVersion: 20
+// Next MinVersion: 21
 
 module arc.mojom;
 
 import "scale_factor.mojom";
 import "screen_rect.mojom";
 
 // Describes OrientationLock request.
 // Note: ChromeOS currently assumes the internal panel is always landscape.
 // All rotation angles mentioned here are measured clockwise.
 [Extensible]
@@ skipping 52 matching lines @@
 // Page for ShowPackageInfoOnPage.
 [Extensible]
 enum ShowPackageInfoPage {
   // The main package info page.
   MAIN = 0,
 
   // Page for managing links assigned to the app.
   MANAGE_LINKS = 1,
 };
 
+// Describes a Play Store app discovery result.
+struct AppDiscoveryResult {
+  string? launch_intent_uri;
+  string? install_intent_uri;
+  string? label;
+  bool is_instant_app;
+  bool is_recent;
+  string? publisher_name;
+  string? formatted_price;
+  float review_score;
+  array<uint8> icon_png_data;
+};
+
 // Next method ID: 18
 interface AppHost {
   // Sends newly added ARC app to Chrome. This message is sent when ARC receives
   // package added notification. Multiple apps may be added in the one package.
   [MinVersion=1] OnAppAddedDeprecated@2(AppInfo app);
 
   // Receives an icon of required |scale_factor| for specific ARC app. The app
   // is defined by |package_name| and |activity|. The icon content cannot be
   // empty and must match to |scale_factor| assuming 48x48 for
   // SCALE_FACTOR_100P.  |scale_factor| is an enum defined at ui/base/layout.h.
@@ skipping 66 matching lines @@
   [MinVersion=16] OnInstallationFinished@15(
       [MinVersion=17] InstallationResult? result@1);
 
   // Notifies that an application shortcut needs to be deleted. Shortcut is
   // defined by its |intent_uri| and |package_name|.
   [MinVersion=18] OnUninstallShortcut@16(string package_name,
                                          string intent_uri);
 };
 
 // TODO(lhchavez): Migrate all request/response messages to Mojo.
-// Next method ID: 16
+// Next method ID: 17
 // Deprecated method ID: 9
 interface AppInstance {
   Init@0(AppHost host_ptr);
 
   // Query if a given resolution can be handled by the application. Returns true
   // if it can.
   [MinVersion=1] CanHandleResolution@4(string package_name, string activity,
                                        ScreenRect dimension) =>
                                            (bool can_handle);
 
@@ skipping 51 matching lines @@
   [MinVersion=10] ShowPackageInfoOnPage@15(string package_name,
                                            ShowPackageInfoPage page,
                                            ScreenRect dimension_on_screen);
 
   // Sets notification setting for the package.
   [MinVersion=6] SetNotificationsEnabled@10(string package_name, bool enabled);
 
   // Sends a request to ARC to uninstall the given package.  Error (if ever
   // happens) is ignored, and uninstall option should appear in the UI.
   [MinVersion=2] UninstallPackage@5(string package_name);
+
+  // Starts a query for Play Store apps.
+  [MinVersion=20] GetRecentAndSuggestedAppsFromPlayStore@16(
+      string query, int32 max_results) =>
+          (array<AppDiscoveryResult> results);
 };