Add new snackbar features to prepare for omnibox geolocation snackbar.

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

Index: chrome/android/java/res/layout/snackbar.xml
diff --git a/chrome/android/java/res/layout/snack_bar.xml b/chrome/android/java/res/layout/snackbar.xml
similarity index 75%
rename from chrome/android/java/res/layout/snack_bar.xml
rename to chrome/android/java/res/layout/snackbar.xml
index 297917c38d44e71b657330adfe4ad1871ef8d9b6..41669de0be73fa0a741ff4f92c92dd110dae6117 100644
--- a/chrome/android/java/res/layout/snack_bar.xml
+++ b/chrome/android/java/res/layout/snackbar.xml
@@ -4,35 +4,35 @@
      found in the LICENSE file. -->
 
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@+id/undobar"
     android:layout_width="match_parent"
-    android:layout_height="@dimen/undo_bar_height"
+    android:layout_height="wrap_content"
     android:background="#282C32"
-    android:orientation="horizontal" >
+    android:minHeight="@dimen/snackbar_min_height"

[newt (away), 2015/07/08 22:12:56]

single-line snackbar height is still 48dp

+    android:orientation="horizontal"
+    android:paddingTop="14dp"
+    android:paddingBottom="14dp" >
 
     <org.chromium.chrome.browser.snackbar.TemplatePreservingTextView
-        android:id="@+id/undobar_message"
+        android:id="@+id/snackbar_message"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_gravity="start|center_vertical"
         android:layout_marginStart="24dp"
         android:layout_weight="1"
-        android:singleLine="true"

[newt (away), 2015/07/08 22:12:56]

This is now set programmatically (and only in some cases) in
SnackbarPopupWindow.

         android:textAlignment="viewStart"
         android:textColor="@android:color/white"
         android:textSize="14sp" />
 
     <TextView
-        android:id="@+id/undobar_button"
+        android:id="@+id/snackbar_button"
         android:layout_width="wrap_content"
         android:layout_height="match_parent"
         android:fontFamily="sans-serif-medium"
         android:gravity="center_vertical"
         android:paddingEnd="24dp"
         android:paddingStart="24dp"
-        android:text="@string/undo_bar_button_text"
         android:textAllCaps="true"
-        android:textColor="@color/snack_bar_button_color"
+        android:textColor="@color/snackbar_button_color"
         android:textSize="14sp" />
 
 </LinearLayout>