[Downloads] Add a horizontal material-styled ProgressBar

chrome/android/java/res/values/attrs.xml

Index: chrome/android/java/res/values/attrs.xml
diff --git a/chrome/android/java/res/values/attrs.xml b/chrome/android/java/res/values/attrs.xml
index 1bdd359edc512d408625648f5cf4389885659bf9..050be4e99deda1428860938dceb371d2463e84a8 100644
--- a/chrome/android/java/res/values/attrs.xml
+++ b/chrome/android/java/res/values/attrs.xml
@@ -57,6 +57,13 @@
         <attr name="backgroundColor" format="reference|color" />
     </declare-styleable>
 
+    <declare-styleable name="MaterialProgressBar">
+        <attr name="colorBackground" format="reference|color" />
+        <attr name="colorProgress" format="reference|color" />
+        <attr name="colorSecondaryProgress" format="reference|color" />
+        <attr name="colorThrobber" format="reference|color" />

[Ian Wen, 2016/12/20 23:17:58]

Try removing this if it is not critical?

Also it would make more sense that we could refer the "dim blue" as the
background, and the "darker blue" as the foreground?

[gone, 2016/12/21 00:54:23]

Dropped the throbber specification; just using a bar colored using colorProgress
on top of the bar that's the background color.

+    </declare-styleable>
+
     <declare-styleable name="RadioButtonWithDescription">
         <attr name="titleText" format="string" />
     </declare-styleable>