Removed usage of AppBarLayout

As a part of effort to reduce the apk size, this CL removes the usage of
AppBarLayout from download home and clear browsing history.

Bug: 956332
Change-Id: Ia8e71fa8b703610836c975fc86f7a354981ebeab
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1611218
Commit-Queue: Shakti Sahu <shaktisahu@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#660260}

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

@@ -5,15 +5,12 @@
 
 <!-- Layout used by ClearBrowsingDataTabsFragment -->
 
-<android.support.design.widget.CoordinatorLayout
+<RelativeLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
-
-    <android.support.design.widget.AppBarLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content" >
+    android:layout_height="match_parent"
+    android:orientation="vertical">
 
     <!-- RTL is handled manually in ClearBrowsingDataTabsFragment because
          it is not working correctly with a ViewPager -->
@@ -26,13 +23,18 @@
         app:tabSelectedTextColor="@color/tab_layout_selected_tab_color"
         app:tabMode="fixed"
         app:tabMaxWidth="0dp"
-            app:tabGravity="fill" />
-
-    </android.support.design.widget.AppBarLayout>
+        app:tabGravity="fill"/>
 
     <android.support.v4.view.ViewPager
         android:id="@+id/clear_browsing_data_viewpager"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        app:layout_behavior="@string/appbar_scrolling_view_behavior"  />
-</android.support.design.widget.CoordinatorLayout>
+        android:layout_below="@id/clear_browsing_data_tabs"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
+
+    <ImageView
+        style="@style/TabBarShadow"
+        android:layout_below="@id/clear_browsing_data_tabs"
+        android:importantForAccessibility="no"/>
+
+</RelativeLayout>

chrome/android/java/res/values-v17/styles.xml

@@ -641,6 +641,18 @@
         <item name="android:layout_height">48dp</item>
         <item name="android:layout_gravity">center</item>
     </style>
+    <style name="TabBarShadow">
+        <item name="android:layout_width">match_parent</item>
+        <item name="android:layout_height">@dimen/action_bar_shadow_height</item>
+        <item name="android:src">@drawable/modern_toolbar_shadow</item>
+        <item name="android:scaleType">fitXY</item>
+    </style>
+    <style name="TabBarLineShadow">
+        <item name="android:layout_width">match_parent</item>
+        <item name="android:layout_height">1dp</item>
+        <item name="android:src">@color/hairline_stroke_color</item>
+        <item name="android:scaleType">fitXY</item>
+    </style>
 
     <style name="AppMenuItem">
         <item name="android:paddingStart">16dp</item>

chrome/android/java/res_download/layout/download_home_tabs.xml

@@ -4,16 +4,12 @@
      found in the LICENSE file.
 -->
 
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:orientation="vertical">
 
-    <android.support.design.widget.AppBarLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content">
-
     <android.support.design.widget.TabLayout
         android:id="@+id/tabs"
         android:layout_width="match_parent"
@@ -39,11 +35,16 @@
 
     </android.support.design.widget.TabLayout>
 
-    </android.support.design.widget.AppBarLayout>
-
     <FrameLayout
         android:id="@+id/content_container"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:layout_below="@+id/tabs"
         android:paddingTop="16dp"/>
-</LinearLayout>
+
+    <ImageView
+        style="@style/TabBarLineShadow"
+        android:layout_below="@+id/tabs"
+        android:importantForAccessibility="no"/>
+
+</RelativeLayout>