[tools] Make paths in v8-heap-stats relative

... to make it work from any location.

Bug: v8:10155
Change-Id: I4b949ed6fde0b38a92c1c1ab57eba0cf0f007b6c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2116034
Auto-Submit: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66835}

tools/heap-stats/details-selection.js

@@ -4,7 +4,7 @@
 
 'use strict';
 
-import {CATEGORIES, CATEGORY_NAMES} from '/categories.js';
+import {CATEGORIES, CATEGORY_NAMES} from './categories.js';
 
 export const VIEW_BY_INSTANCE_TYPE = 'by-instance-type';
 export const VIEW_BY_INSTANCE_CATEGORY = 'by-instance-category';

tools/heap-stats/global-timeline.js

@@ -8,7 +8,7 @@ import {
   VIEW_BY_INSTANCE_TYPE,
   VIEW_BY_INSTANCE_CATEGORY,
   VIEW_BY_FIELD_TYPE
-} from '/details-selection.js';
+} from './details-selection.js';
 
 defineCustomElement('global-timeline', (templateText) =>
  class GlobalTimeline extends HTMLElement {

tools/heap-stats/histogram-viewer.js

@@ -8,7 +8,7 @@ import {
   VIEW_BY_INSTANCE_TYPE,
   VIEW_BY_INSTANCE_CATEGORY,
   VIEW_BY_FIELD_TYPE
-} from '/details-selection.js';
+} from './details-selection.js';
 
 defineCustomElement('histogram-viewer', (templateText) =>
  class HistogramViewer extends HTMLElement {

tools/heap-stats/index.html

@@ -18,10 +18,10 @@ found in the LICENSE file. -->
 
   <script src="helper.js"></script>
 
-  <script type="module" src="/details-selection.js"></script>
-  <script type="module" src="/global-timeline.js"></script>
-  <script type="module" src="/histogram-viewer.js"></script>
-  <script type="module" src="/trace-file-reader.js"></script>
+  <script type="module" src="details-selection.js"></script>
+  <script type="module" src="global-timeline.js"></script>
+  <script type="module" src="histogram-viewer.js"></script>
+  <script type="module" src="trace-file-reader.js"></script>
 
   <style>
 body {

tools/heap-stats/trace-file-reader.js

@@ -4,7 +4,7 @@
 
 'use strict';
 
-import {Isolate} from '/model.js';
+import {Isolate} from './model.js';
 
 defineCustomElement('trace-file-reader', (templateText) =>
  class TraceFileReader extends HTMLElement {