Screenshots attached for 
CL : https://codereview.chromium.org/2874563002/

Deleted: download_info_icon.png 156 KB

	download_info_icon.png 156 KB View Download

Deleted: download_filter.png 144 KB

	download_filter.png 144 KB View Download

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/62a0b7c64ca4191c494bf2fde98e8a9a72ff57fa

commit 62a0b7c64ca4191c494bf2fde98e8a9a72ff57fa
Author: shaktisahu <shaktisahu@chromium.org>
Date: Mon May 15 18:35:31 2017

Download home : Added info menu icon

Added an info menu icon to the download home toolbar which will toggle
the visibility of disk space usage info header. This info is disabled
by default at the start of download home.

Also added back the icons for the download filter types.

Also fixed a NullPointerException in the filter adapter.

BUG= 720141 , 717495

Review-Url: https://codereview.chromium.org/2874563002
Cr-Commit-Position: refs/heads/master@{#471840}

[modify] https://crrev.com/62a0b7c64ca4191c494bf2fde98e8a9a72ff57fa/chrome/android/java/res/layout/download_manager_spinner_drop_down.xml
[modify] https://crrev.com/62a0b7c64ca4191c494bf2fde98e8a9a72ff57fa/chrome/android/java/res/menu/download_manager_menu.xml
[modify] https://crrev.com/62a0b7c64ca4191c494bf2fde98e8a9a72ff57fa/chrome/android/java/src/org/chromium/chrome/browser/ChromeFeatureList.java
[modify] https://crrev.com/62a0b7c64ca4191c494bf2fde98e8a9a72ff57fa/chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadHistoryAdapter.java
[modify] https://crrev.com/62a0b7c64ca4191c494bf2fde98e8a9a72ff57fa/chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadManagerToolbar.java
[modify] https://crrev.com/62a0b7c64ca4191c494bf2fde98e8a9a72ff57fa/chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadManagerUi.java
[modify] https://crrev.com/62a0b7c64ca4191c494bf2fde98e8a9a72ff57fa/chrome/android/java/src/org/chromium/chrome/browser/download/ui/FilterAdapter.java
[modify] https://crrev.com/62a0b7c64ca4191c494bf2fde98e8a9a72ff57fa/chrome/android/java/strings/android_chrome_strings.grd
[modify] https://crrev.com/62a0b7c64ca4191c494bf2fde98e8a9a72ff57fa/chrome/android/javatests/src/org/chromium/chrome/browser/download/DownloadActivityTest.java
[modify] https://crrev.com/62a0b7c64ca4191c494bf2fde98e8a9a72ff57fa/chrome/android/javatests/src/org/chromium/chrome/browser/download/ui/DownloadHistoryAdapterTest.java
[modify] https://crrev.com/62a0b7c64ca4191c494bf2fde98e8a9a72ff57fa/chrome/browser/android/chrome_feature_list.cc
[modify] https://crrev.com/62a0b7c64ca4191c494bf2fde98e8a9a72ff57fa/chrome/browser/android/chrome_feature_list.h
[modify] https://crrev.com/62a0b7c64ca4191c494bf2fde98e8a9a72ff57fa/tools/metrics/histograms/histograms.xml