Bug 1317102 - Part 5: Increase the max grid highlighters shown to 3. r=pbro

devtools/client/inspector/grids/test/browser_grids_grid-list-on-mutation-element-added.js

@@ -22,6 +22,7 @@ const TEST_URI = `
 `;
 
 add_task(async function() {
+  await pushPref("devtools.gridinspector.maxHighlighters", 1);
   await addTab("data:text/html;charset=utf-8," + encodeURIComponent(TEST_URI));
   const { inspector, gridInspector, testActor } = await openLayoutView();
   const { document: doc } = gridInspector;

devtools/client/inspector/grids/test/browser_grids_grid-list-toggle-grids_02.js

@@ -23,6 +23,7 @@ const TEST_URI = `
 `;
 
 add_task(async function() {
+  await pushPref("devtools.gridinspector.maxHighlighters", 1);
   await addTab("data:text/html;charset=utf-8," + encodeURIComponent(TEST_URI));
   const { inspector, gridInspector } = await openLayoutView();
   const { document: doc } = gridInspector;

devtools/client/inspector/rules/test/browser_rules_grid-toggle_03.js

@@ -23,6 +23,7 @@ const TEST_URI = `
 `;
 
 add_task(async function() {
+  await pushPref("devtools.gridinspector.maxHighlighters", 1);
   await addTab("data:text/html;charset=utf-8," + encodeURIComponent(TEST_URI));
   const {inspector, view} = await openRuleView();
   const highlighters = view.highlighters;

devtools/client/preferences/devtools-client.js

@@ -74,7 +74,7 @@ pref("devtools.gridinspector.showGridAreas", false);
 pref("devtools.gridinspector.showGridLineNumbers", false);
 pref("devtools.gridinspector.showInfiniteLines", false);
 // Max number of grid highlighters that can be displayed
-pref("devtools.gridinspector.maxHighlighters", 1);
+pref("devtools.gridinspector.maxHighlighters", 3);
 
 // Whether or not the box model panel is opened in the layout view
 pref("devtools.layout.boxmodel.opened", true);