DevTools: introduce spritesheet assembler.

third_party/WebKit/LayoutTests/inspector/audits/audits-panel-functional-expected.txt

Index: third_party/WebKit/LayoutTests/inspector/audits/audits-panel-functional-expected.txt
diff --git a/third_party/WebKit/LayoutTests/inspector/audits/audits-panel-functional-expected.txt b/third_party/WebKit/LayoutTests/inspector/audits/audits-panel-functional-expected.txt
index cd1f2a120f929b708f93c8f3b6cd9e05f178c59e..6f6a55d6b6cd0472c9fd61bfd48fc73954f245c4 100644
--- a/third_party/WebKit/LayoutTests/inspector/audits/audits-panel-functional-expected.txt
+++ b/third_party/WebKit/LayoutTests/inspector/audits/audits-panel-functional-expected.txt
@@ -3,19 +3,19 @@ Tests audit rules.
    Text Link
 Page reloaded.
     Network Utilization
-        [spritesheet-smallicons smallicon-red-ball severity] Combine external JavaScript (4)
+        [smallicon-red-ball severity] 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].
-        [spritesheet-smallicons smallicon-orange-ball severity] Specify image dimensions (2)
+        [smallicon-orange-ball severity] Specify image dimensions (2)
          A width and height should be specified for all images in order to speed up page display. The following image(s) are missing a width and/or height:
            foo1.jpg
            foo2.jpg
     Web Page Performance
-        [spritesheet-smallicons smallicon-red-ball severity] Optimize the order of styles and scripts (2)
+        [smallicon-red-ball severity] Optimize the order of styles and scripts (2)
          The following external CSS files were included after an external JavaScript file in the document head. To ensure CSS files are downloaded in parallel, always include external CSS before external JavaScript.
            audits-style1.css
           1 inline script block was 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.
-        [spritesheet-smallicons smallicon-red-ball severity] Put CSS in the document head (2)
+        [smallicon-red-ball severity] Put CSS in the document head (2)
          CSS in the document body adversely impacts rendering performance.
          1 style block(s) in the 
           audits-panel-functional.html
@@ -24,7 +24,7 @@ Page reloaded.
           audits-style1.css
           should be moved to the document head in 
           audits-panel-functional.html
-        [spritesheet-smallicons smallicon-orange-ball severity] Remove unused CSS rules (10)
+        [smallicon-orange-ball severity] Remove unused CSS rules (10)
          10 rules (50%) of CSS not used by the current page.
           Inline block #1: 41% is not used by the current page.
            .unused