Revert of DevTools: Add icons to performance pane tabs.

third_party/WebKit/Source/devtools/front_end/ui/inspectorCommon.css

Index: third_party/WebKit/Source/devtools/front_end/ui/inspectorCommon.css
diff --git a/third_party/WebKit/Source/devtools/front_end/ui/inspectorCommon.css b/third_party/WebKit/Source/devtools/front_end/ui/inspectorCommon.css
index bb4feebcdc4331cf5d21a60d6f97f3e38036403d..21f9cdb884e4f90190e1c716414fd78536ff1ee1 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui/inspectorCommon.css
+++ b/third_party/WebKit/Source/devtools/front_end/ui/inspectorCommon.css
@@ -343,12 +343,12 @@
 
 .spritesheet-largeicons:not(.icon-mask) {
     background-image: -webkit-image-set(url(Images/toolbarButtonGlyphs.png) 1x, url(Images/toolbarButtonGlyphs_2x.png) 2x);
-    background-size: 352px 192px;
+    background-size: 352px 168px;
 }
 
 .spritesheet-largeicons.icon-mask {
     -webkit-mask-image: -webkit-image-set(url(Images/toolbarButtonGlyphs.png) 1x, url(Images/toolbarButtonGlyphs_2x.png) 2x);
-    -webkit-mask-size: 352px 192px;
+    -webkit-mask-size: 352px 168px;
 }
 
 .spritesheet-resourceicons:not(.icon-mask) {
@@ -372,7 +372,7 @@
 
 .force-white-icons [is=ui-icon].spritesheet-largeicons, [is=ui-icon].force-white-icons.spritesheet-largeicons {
     -webkit-mask-image: -webkit-image-set(url(Images/toolbarButtonGlyphs.png) 1x, url(Images/toolbarButtonGlyphs_2x.png) 2x);
-    -webkit-mask-size: 352px 192px;
+    -webkit-mask-size: 352px 168px;
     background-image: unset;
     background-size: unset;
     background: unset;