Removed dependency on Google App Launcher

Since the real dependency is for Download Manager to suggest the
installation of Google Drive if Google Drive is not already installed,
it will make the implementation much simpler to directly query
existence of Google Drive app than to go through Google App Launcher.

Bug: 741948
Change-Id: Id121fed82ccf578c4d1373089df0e3045a7fe2c8
Reviewed-on: https://chromium-review.googlesource.com/568635Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Commit-Queue: Peter Lee <pkl@chromium.org>
Cr-Commit-Position: refs/heads/master@{#486922}

ios/chrome/browser/ui/downloads/BUILD.gn

@@ -21,14 +21,11 @@ source_set("downloads") {
     "//components/strings",
     "//ios/chrome/app/strings",
     "//ios/chrome/browser",
-    "//ios/chrome/browser/native_app_launcher",
     "//ios/chrome/browser/store_kit",
     "//ios/chrome/browser/ui",
     "//ios/chrome/browser/ui/alert_coordinator",
     "//ios/chrome/browser/ui/colors",
     "//ios/chrome/browser/web:web_internal",
-    "//ios/public/provider/chrome/browser",
-    "//ios/public/provider/chrome/browser/native_app_launcher",
     "//ios/third_party/material_components_ios",
     "//ios/third_party/material_roboto_font_loader_ios",
     "//ios/web",

ios/chrome/browser/ui/downloads/download_manager_controller.mm

@@ -21,7 +21,6 @@
 #include "base/threading/sequenced_worker_pool.h"
 #include "components/strings/grit/components_strings.h"
 #import "ios/chrome/browser/installation_notifier.h"
-#include "ios/chrome/browser/native_app_launcher/ios_appstore_ids.h"
 #import "ios/chrome/browser/store_kit/store_kit_tab_helper.h"
 #import "ios/chrome/browser/ui/alert_coordinator/alert_coordinator.h"
 #import "ios/chrome/browser/ui/colors/MDCPalette+CrAdditions.h"
@@ -29,9 +28,6 @@
 #include "ios/chrome/browser/ui/ui_util.h"
 #import "ios/chrome/browser/ui/uikit_ui_util.h"
 #include "ios/chrome/grit/ios_strings.h"
-#include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
-#import "ios/public/provider/chrome/browser/native_app_launcher/native_app_metadata.h"
-#import "ios/public/provider/chrome/browser/native_app_launcher/native_app_whitelist_manager.h"
 #import "ios/third_party/material_components_ios/src/components/ActivityIndicator/src/MaterialActivityIndicator.h"
 #import "ios/third_party/material_components_ios/src/components/Buttons/src/MaterialButtons.h"
 #import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.h"
@@ -210,6 +206,8 @@ using net::URLRequestStatus;
 
 namespace {
 
+NSString* kGoogleDriveAppStoreId = @"507874739";
+NSString* kGoogleDriveURL = @"googledrive://";
 NSString* kGoogleDriveBundleId = @"com.google.Drive";
 
 // Key of the UMA Download.IOSDownloadFileResult histogram.
@@ -489,10 +487,6 @@ class DownloadContentDelegate : public URLFetcherDelegate {
 // downloaded.
 @property(nonatomic) double fractionDownloaded;
 
-// Used to get a URL scheme that Drive responds to, to register with the
-// InstallationNotifier.
-@property(nonatomic, strong) id<NativeAppMetadata> googleDriveMetadata;
-
 @end
 
 @implementation DownloadManagerController
@@ -523,7 +517,6 @@ class DownloadContentDelegate : public URLFetcherDelegate {
 @synthesize fileTypeLabelCentered = _fileTypeLabelCentered;
 @synthesize downloadStartedTime = _downloadStartedTime;
 @synthesize fractionDownloaded = _fractionDownloaded;
-@synthesize googleDriveMetadata = _googleDriveMetadata;
 
 - (instancetype)initWithWebState:(web::WebState*)webState
                      downloadURL:(const GURL&)url {
@@ -1055,11 +1048,8 @@ class DownloadContentDelegate : public URLFetcherDelegate {
                                                      title:title
                                                    message:message];
 
-  // |googleDriveMetadata| contains the information necessary to either launch
-  // the Google Drive app or navigate to its StoreKit page.  If the metadata is
-  // not present, do not show the upload button at all.
   StoreKitTabHelper* tabHelper = StoreKitTabHelper::FromWebState(_webState);
-  if (self.googleDriveMetadata && tabHelper) {
+  if (tabHelper) {
     NSString* googleDriveButtonTitle =
         l10n_util::GetNSString(IDS_IOS_DOWNLOAD_MANAGER_UPLOAD_TO_GOOGLE_DRIVE);
     __weak DownloadManagerController* weakSelf = self;
@@ -1314,25 +1304,6 @@ class DownloadContentDelegate : public URLFetcherDelegate {
   [_documentContainer
       setBackgroundColor:UIColorFromRGB(kDownloadedDocumentColor)];
 
-  // If Google Drive is not installed and the metadata is present that knows how
-  // to install it, display the "Install Google Drive" button.
-  NSString* driveAppId = base::SysUTF8ToNSString(kIOSAppStoreGoogleDrive);
-  NSArray* matchingApps =
-      [ios::GetChromeBrowserProvider()->GetNativeAppWhitelistManager()
-          filteredAppsUsingBlock:^BOOL(const id<NativeAppMetadata> app,
-                                       BOOL* stop) {
-            if ([[app appId] isEqualToString:driveAppId]) {
-              *stop = YES;
-              return YES;
-            }
-            return NO;
-          }];
-  BOOL showGoogleDriveButton = NO;
-  if (matchingApps.count == 1U) {
-    self.googleDriveMetadata = matchingApps[0];
-    showGoogleDriveButton = ![self.googleDriveMetadata isInstalled];
-  }
-
   CAKeyframeAnimation* animation =
       [CAKeyframeAnimation animationWithKeyPath:@"transform"];
   NSArray* vals = @[
@@ -1348,6 +1319,10 @@ class DownloadContentDelegate : public URLFetcherDelegate {
   [_documentContainer.layer addAnimation:animation
                                   forKey:kDocumentPopAnimationKey];
 
+  // Displays the "Install Google Drive" button if it is not installed.
+  NSURL* googleDriveURL = [NSURL URLWithString:kGoogleDriveURL];
+  BOOL showGoogleDriveButton =
+      ![[UIApplication sharedApplication] canOpenURL:googleDriveURL];
   __weak UIImageView* weakFoldIcon = _foldIcon;
   [UIView transitionWithView:_foldIcon
       duration:kDownloadCompleteAnimationDuration
@@ -1569,11 +1544,12 @@ class DownloadContentDelegate : public URLFetcherDelegate {
 - (void)openGoogleDriveInAppStore {
   StoreKitTabHelper* helper = StoreKitTabHelper::FromWebState(_webState);
   if (helper) {
+    NSString* scheme = [[NSURL URLWithString:kGoogleDriveURL] scheme];
     [[InstallationNotifier sharedInstance]
         registerForInstallationNotifications:self
                                 withSelector:@selector(hideGoogleDriveButton)
-                                   forScheme:[_googleDriveMetadata anyScheme]];
-    helper->OpenAppStore([_googleDriveMetadata appId]);
+                                   forScheme:scheme];
+    helper->OpenAppStore(kGoogleDriveAppStoreId);
   }
 }