Refactor the view hierarchy of snackbars and infobars

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

Index: chrome/android/java/res/layout/main.xml
diff --git a/chrome/android/java/res/layout/main.xml b/chrome/android/java/res/layout/main.xml
index bd8c9a51ebc73dfbf38a06f44796f002bbf85f74..ab98289b346b663b96268da0fe8632b27a2c8767 100644
--- a/chrome/android/java/res/layout/main.xml
+++ b/chrome/android/java/res/layout/main.xml
@@ -10,22 +10,32 @@
         android:layout_height="match_parent"
         android:orientation="vertical">
 
-        <org.chromium.chrome.browser.compositor.CompositorViewHolder
-            android:id="@+id/compositor_view_holder"
+        <android.support.design.widget.CoordinatorLayout
+            android:id="@+id/coordinator"
             android:layout_width="match_parent"
             android:layout_height="0dp"
             android:layout_weight="1" >
 
+            <org.chromium.chrome.browser.compositor.CompositorViewHolder
+                android:id="@+id/compositor_view_holder"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent" />
+
             <ViewStub
                 android:id="@+id/omnibox_results_container_stub"
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
                 android:layout_marginTop="@dimen/tab_strip_height"
                 android:inflatedId="@+id/omnibox_results_container"
-                android:layout="@layout/omnibox_results_container"
-                app:layout_behavior="org.chromium.chrome.browser.compositor.CompositorViewHolderBehavior" />
+                android:layout="@layout/omnibox_results_container" />
+
+            <FrameLayout
+                android:id="@+id/bottom_container"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_gravity="start|bottom" />
 
-        </org.chromium.chrome.browser.compositor.CompositorViewHolder>
+        </android.support.design.widget.CoordinatorLayout>
 
         <HorizontalScrollView
             android:id="@+id/keyboard_accessory"