Expand bottom sheet when URL bar is focused

chrome/android/java/src/org/chromium/chrome/browser/toolbar/BottomToolbarPhone.java

Index: chrome/android/java/src/org/chromium/chrome/browser/toolbar/BottomToolbarPhone.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/toolbar/BottomToolbarPhone.java b/chrome/android/java/src/org/chromium/chrome/browser/toolbar/BottomToolbarPhone.java
index af5e6db1809dde3b681d3c632650180f7c22519a..c5cdcf895b1810e652b66a78edb6cd08ac49c830 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/toolbar/BottomToolbarPhone.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/toolbar/BottomToolbarPhone.java
@@ -8,11 +8,19 @@ import android.content.Context;
 import android.util.AttributeSet;
 
 import org.chromium.chrome.R;
+import org.chromium.chrome.browser.widget.BottomSheet;
 
 /**
  * Phone specific toolbar that exists at the bottom of the screen.
  */
 public class BottomToolbarPhone extends ToolbarPhone {
+
+    /** A handle to the bottom sheet. */
+    private BottomSheet mBottomSheet;
+
+    /** The state of the bottom sheet before the URL bar was focused. */
+    private int mStateBeforeUrlFocus;
+
     /**
      * Constructs a BottomToolbarPhone object.
      * @param context The Context in which this View object is created.
@@ -28,4 +36,20 @@ public class BottomToolbarPhone extends ToolbarPhone {
         // be at the top of the toolbar.
         return getContext().getResources().getDimensionPixelSize(R.dimen.toolbar_shadow_height);
     }
+
+    @Override
+    protected void triggerUrlFocusAnimation(final boolean hasFocus) {
+        super.triggerUrlFocusAnimation(hasFocus);
+
+        if (mBottomSheet == null) return;
+
+        if (hasFocus) mStateBeforeUrlFocus = mBottomSheet.getSheetState();
+        mBottomSheet.setSheetState(
+                hasFocus ? BottomSheet.SHEET_STATE_FULL : mStateBeforeUrlFocus, true);
+    }
+
+    @Override
+    public void setBottomSheet(BottomSheet sheet) {
+        mBottomSheet = sheet;
+    }
 }