DevTools: migrate sidebar pane's titleElement to use Toolbar.

LayoutTests/inspector/audits/audits-panel-noimages-functional-expected.txt

Index: LayoutTests/inspector/audits/audits-panel-noimages-functional-expected.txt
diff --git a/LayoutTests/inspector/audits/audits-panel-noimages-functional-expected.txt b/LayoutTests/inspector/audits/audits-panel-noimages-functional-expected.txt
index 46b11aa5fc1b3f9bfa3ac53e3603cd846334e525..c7c61bdee29094bb6a7889b82dc80fc26a139fff 100644
--- a/LayoutTests/inspector/audits/audits-panel-noimages-functional-expected.txt
+++ b/LayoutTests/inspector/audits/audits-panel-noimages-functional-expected.txt
@@ -1,34 +1,34 @@
 Tests audit rules on a page without images.
 Page reloaded.
  Network Utilization
-      [severity severe] Combine external JavaScript (4)
-       There are multiple resources served from same domain. Consider combining them into as few files as possible.
-        4 JavaScript resources served from [domain].
+     [severity severe] Combine external JavaScript (4)
+      There are multiple resources served from same domain. Consider combining them into as few files as possible.
+       4 JavaScript resources served from [domain].
  Web Page Performance
-      [severity severe] Optimize the order of styles and scripts (3)
-        3 inline script blocks were found in the head between an external CSS file and another resource. To allow parallel downloading, move the inline script before the external CSS file, or after the next resource.
-      [severity severe] Put CSS in the document head (2)
-       CSS in the document body adversely impacts rendering performance.
-       1 style block(s) in the 
-        audits-panel-noimages-functional.html
-        body should be moved to the document head.
-       Link node 
+     [severity severe] Optimize the order of styles and scripts (3)
+       3 inline script blocks were found in the head between an external CSS file and another resource. To allow parallel downloading, move the inline script before the external CSS file, or after the next resource.
+     [severity severe] Put CSS in the document head (2)
+      CSS in the document body adversely impacts rendering performance.
+      1 style block(s) in the 
+       audits-panel-noimages-functional.html
+       body should be moved to the document head.
+      Link node 
+       audits-style1.css
+       should be moved to the document head in 
+       audits-panel-noimages-functional.html
+     [severity warning] Remove unused CSS rules (5)
+      5 rules (100%) of CSS not used by the current page.
+       Inline block #1: 100% is not used by the current page.
+        .unused
+       Inline block #2: 100% is not used by the current page.
+        .violation
         audits-style1.css
-        should be moved to the document head in 
-        audits-panel-noimages-functional.html
-      [severity warning] Remove unused CSS rules (5)
-       5 rules (100%) of CSS not used by the current page.
-        Inline block #1: 100% is not used by the current page.
-         .unused
-        Inline block #2: 100% is not used by the current page.
-         .violation
-         audits-style1.css
-        : 100% is not used by the current page.
-         .some-style
-         audits-style1.css
-        : 100% is not used by the current page.
-         .some-style
-         audits-style1.css
-        : 100% is not used by the current page.
-         .some-style
+       : 100% is not used by the current page.
+        .some-style
+        audits-style1.css
+       : 100% is not used by the current page.
+        .some-style
+        audits-style1.css
+       : 100% is not used by the current page.
+        .some-style