Make GrDiffGroupRange use LineRange

This is to avoid having two very similar but inconsistent range types in
the API.

Change-Id: I14497e6e2cc0d1c519346bf024894dcf9be6eeed
diff --git a/polygerrit-ui/app/elements/diff/gr-diff-processor/gr-diff-processor.ts b/polygerrit-ui/app/elements/diff/gr-diff-processor/gr-diff-processor.ts
index 5a432dd..a0584b6 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-processor/gr-diff-processor.ts
+++ b/polygerrit-ui/app/elements/diff/gr-diff-processor/gr-diff-processor.ts
@@ -371,8 +371,11 @@
     group.ignoredWhitespaceOnly = !!chunk.common;
     if (chunk.skip) {
       group.lineRange = {
-        left: {start: offsetLeft, end: offsetLeft + chunk.skip - 1},
-        right: {start: offsetRight, end: offsetRight + chunk.skip - 1},
+        left: {start_line: offsetLeft, end_line: offsetLeft + chunk.skip - 1},
+        right: {
+          start_line: offsetRight,
+          end_line: offsetRight + chunk.skip - 1,
+        },
       };
     }
     return group;
diff --git a/polygerrit-ui/app/elements/diff/gr-diff-processor/gr-diff-processor_test.js b/polygerrit-ui/app/elements/diff/gr-diff-processor/gr-diff-processor_test.js
index 0c3c9bf..f5cbcc0 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-processor/gr-diff-processor_test.js
+++ b/polygerrit-ui/app/elements/diff/gr-diff-processor/gr-diff-processor_test.js
@@ -202,8 +202,8 @@
         const skipGroup = commonGroup.contextGroups[1];
         assert.equal(skipGroup.skip, 43900);
         const expectedRange = {
-          left: {start: 21, end: 43920},
-          right: {start: 21, end: 43920},
+          left: {start_line: 21, end_line: 43920},
+          right: {start_line: 21, end_line: 43920},
         };
         assert.deepEqual(skipGroup.lineRange, expectedRange);
 
@@ -499,8 +499,8 @@
       const skipGroup = commonGroup.contextGroups[1];
       assert.equal(skipGroup.skip, 60);
       const expectedRange = {
-        left: {start: 22, end: 81},
-        right: {start: 21, end: 80},
+        left: {start_line: 22, end_line: 81},
+        right: {start_line: 21, end_line: 80},
       };
       assert.deepEqual(skipGroup.lineRange, expectedRange);
 
@@ -834,20 +834,26 @@
         assert.deepEqual(
             skippedGroup.lineRange,
             {
-              left: {start: lineNums.left + 1, end: lineNums.left + skip},
-              right: {start: lineNums.right + 1, end: lineNums.right + skip},
+              left: {
+                start_line: lineNums.left + 1,
+                end_line: lineNums.left + skip,
+              },
+              right: {
+                start_line: lineNums.right + 1,
+                end_line: lineNums.right + skip,
+              },
             });
 
         assert.deepEqual(
             abGroup.lineRange,
             {
               left: {
-                start: lineNums.left + skip + 1,
-                end: lineNums.left + skip + rows.length,
+                start_line: lineNums.left + skip + 1,
+                end_line: lineNums.left + skip + rows.length,
               },
               right: {
-                start: lineNums.right + skip + 1,
-                end: lineNums.right + skip + rows.length,
+                start_line: lineNums.right + skip + 1,
+                end_line: lineNums.right + skip + rows.length,
               },
             });
       });