Revert "Revert "[Home] Separate swipe detecting logic from the bottom sheet""

This reverts commit cf0d7c2a.

Reason for revert: Fix interface impl bug

Original change's description:
[Home] Separate swipe detecting logic from the bottom sheet

This change moves all of the swipe detecting from the bottom sheet
into its own class. A relatively simple interface has been introduced
to prevent needing the entire bottom sheet to detect swipes.

BUG=

TBR=tedchoc@chromium.org

Change-Id: Ie77d5c2bcec7874787bd23bf347c6abd8716b492
Reviewed-on: https://chromium-review.googlesource.com/812466Reviewed-by: Theresa <twellington@chromium.org>
Reviewed-by: Matthew Jones <mdjones@chromium.org>
Commit-Queue: Matthew Jones <mdjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#522271}

chrome/android/java/src/org/chromium/chrome/browser/widget/bottomsheet/BottomSheetContentController.java

@@ -110,7 +110,7 @@ public class BottomSheetContentController
                 float offsetY = mBottomSheet.getSheetHeightForState(mBottomSheet.isSmallScreen()
                                                 ? BottomSheet.SHEET_STATE_FULL
                                                 : BottomSheet.SHEET_STATE_HALF)
-                        - mBottomSheet.getSheetOffsetFromBottom();
+                        - mBottomSheet.getCurrentOffsetPx();
                 setTranslationY(Math.max(offsetY, 0f));
 
                 if (mBottomSheet.getTargetSheetState() != BottomSheet.SHEET_STATE_PEEK

chrome/android/java_sources.gni

@@ -1363,6 +1363,7 @@ chrome_java_sources = [
   "java/src/org/chromium/chrome/browser/widget/animation/CancelAwareAnimatorListener.java",
   "java/src/org/chromium/chrome/browser/widget/animation/FocusAnimator.java",
   "java/src/org/chromium/chrome/browser/widget/bottomsheet/BottomSheet.java",
+  "java/src/org/chromium/chrome/browser/widget/bottomsheet/BottomSheetSwipeDetector.java",
   "java/src/org/chromium/chrome/browser/widget/bottomsheet/BottomSheetContentController.java",
   "java/src/org/chromium/chrome/browser/widget/bottomsheet/BottomSheetMetrics.java",
   "java/src/org/chromium/chrome/browser/widget/bottomsheet/BottomSheetNavigationItemView.java",
@@ -1981,6 +1982,7 @@ chrome_junit_test_java_sources = [
   "junit/src/org/chromium/chrome/browser/webapps/WebappInfoTest.java",
   "junit/src/org/chromium/chrome/browser/webapps/WebApkInfoTest.java",
   "junit/src/org/chromium/chrome/browser/webapps/WebApkUpdateManagerUnitTest.java",
+  "junit/src/org/chromium/chrome/browser/widget/bottomsheet/BottomSheetSwipeDetectorTest.java",
   "junit/src/org/chromium/chrome/browser/widget/selection/SelectionDelegateTest.java",
 ]
 

chrome/android/junit/src/org/chromium/chrome/browser/widget/bottomsheet/OWNERS

+mdjones@chromium.org
+twellington@chromium.org
+
+# COMPONENT: UI>Browser>Mobile>NavPanel