Log messages regarding why app banners aren't displayed to the console

chrome/browser/android/banners/app_banner_manager_android.h

 // 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.
 
 #ifndef CHROME_BROWSER_ANDROID_BANNERS_APP_BANNER_MANAGER_ANDROID_H_
 #define CHROME_BROWSER_ANDROID_BANNERS_APP_BANNER_MANAGER_ANDROID_H_
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_weak_ref.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/android/banners/app_banner_data_fetcher_android.h"
+#include "chrome/browser/banners/app_banner_debug_log.h"
 #include "chrome/browser/banners/app_banner_manager.h"
 
 namespace banners {
 class AppBannerDataFetcherAndroid;
 
 // Extends the AppBannerManager to support native Android apps.
 // TODO(dfalcantara): Flip it so the C++ AppBannerManagerAndroid owns the
 // Java AppBannerManager, move ownership of the AppBannerManagerAndroid to
 // the TabAndroid class, then move functions for retriving info from Java to
 // the AppBannerDataFetcherAndroid.
@@ skipping 29 matching lines @@
   AppBannerDataFetcher* CreateAppBannerDataFetcher(
       base::WeakPtr<AppBannerDataFetcher::Delegate> weak_delegate,
       const int ideal_icon_size) override;
 
  private:
   // AppBannerDataFetcher::Delegate overrides.
   bool HandleNonWebApp(const std::string& platform,
                        const GURL& url,
                        const std::string& id) override;
 
+  bool CheckPlatformAndId(const std::string& platform, const std::string& id);
+
+  bool CheckFetcherMatchesContents();
+
   // AppBannerManager on the Java side.
   JavaObjectWeakGlobalRef weak_java_banner_view_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(AppBannerManagerAndroid);
 };  // class AppBannerManagerAndroid
 
 }  // namespace banners
 
 #endif  // CHROME_BROWSER_ANDROID_BANNERS_APP_BANNER_MANAGER_ANDROID_H_