[Payments] Remove unused files and fix coding style

chrome/android/java/src/org/chromium/chrome/browser/payments/ui/PaymentRequestSection.java

Index: chrome/android/java/src/org/chromium/chrome/browser/payments/ui/PaymentRequestSection.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/PaymentRequestSection.java b/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/PaymentRequestSection.java
index 128dd59c415dc9290f13ae57872c3435b927e9cd..406b4f022ff64437a7733b89840018db680577de 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/PaymentRequestSection.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/PaymentRequestSection.java
@@ -1056,10 +1056,11 @@ public abstract class PaymentRequestSection extends LinearLayout implements View
         /** Indicates whether the summary is displayed in a single line. */
         private boolean mSummaryInSingleLine;
 
-        /** Indicates whether the summary is set to display in a single line in DISPLAY_MODE_NORMAL
+        /**
+         * Indicates whether the summary is set to display in a single line in DISPLAY_MODE_NORMAL
          * by caller.
          */
-        boolean mSetDisplaySummaryInSingleLineInNormalMode = true;
+        private boolean mSetDisplaySummaryInSingleLineInNormalMode = true;
 
         /** Indicates whether the summary is set to R.style.PaymentsUiSectionDescriptiveText. */
         private boolean mSummaryInDescriptiveText;