[Downloads] Add a horizontal material-styled ProgressBar

chrome/android/java/res/layout/download_item_view.xml

Index: chrome/android/java/res/layout/download_item_view.xml
diff --git a/chrome/android/java/res/layout/download_item_view.xml b/chrome/android/java/res/layout/download_item_view.xml
index 679d1f85dbf244d5086f63075c786d367191a5bf..1210f0f4efd73937c888117884f8affe82c519ad 100644
--- a/chrome/android/java/res/layout/download_item_view.xml
+++ b/chrome/android/java/res/layout/download_item_view.xml
@@ -96,16 +96,18 @@
                     android:textColor="@color/default_text_color"
                     android:textSize="14sp" />
 
-            <ProgressBar
+            <org.chromium.chrome.browser.widget.MaterialProgressBar
                     android:id="@+id/download_progress_view"
-                    style="@style/DownloadProgressBar"
                     android:layout_width="wrap_content"
                     android:layout_height="2dp"
                     android:layout_marginTop="5dp"
                     android:layout_marginBottom="5dp"
                     android:layout_below="@+id/filename_progress_view"
                     android:layout_alignParentStart="true"
-                    android:layout_toStartOf="@+id/pause_button" />
+                    android:layout_toStartOf="@+id/pause_button"
+                    chrome:colorBackground="@color/google_grey_400"

[Ian Wen, 2016/12/21 23:17:27]

Up to you, optional, nit:

Maybe we could set these colors as default and most users of this class won't
bother to set these values repetitively.

[gone, 2016/12/22 00:58:38]

Worth revisiting when it's more than just downloads using this, I think.  The
current implementation uses whatever defaults are defined for regular progress
bars in colors.xml.

+                    chrome:colorProgress="@color/light_active_color"
+                    chrome:colorSecondaryProgress="@color/google_grey_600" />
 
             <TextView
                     android:id="@+id/status_view"