DevTools: shard inspector/debugger tests for faster execution.

LayoutTests/inspector/sources/debugger/async-callstack-in-console-expected.txt

-CONSOLE ERROR: line 24: Uncaught Error: foo
-CONSOLE ERROR: line 37: Failed to execute 'postMessage' on 'DOMWindow': The target origin provided ('http://www.example.com') does not match the recipient window's origin ('').
-Tests asynchronous call stacks printed in console.
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-Set timer for test function.
-async-callstack-in-console.html:11 Console was cleared
-
-    async-callstack-in-console.html:17 console.trace()
-        
-timeout1 @ async-callstack-in-console.html:17
-setTimeout (async)
-testFunction @ async-callstack-in-console.html:12
-
-    async-callstack-in-console.html:24 Uncaught Error: foo
-        
-timeout2 @ async-callstack-in-console.html:24
-setTimeout (async)
-timeout1 @ async-callstack-in-console.html:18
-setTimeout (async)
-testFunction @ async-callstack-in-console.html:12
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-    async-callstack-in-console.html:29 console.trace()
-        
-timeout3 @ async-callstack-in-console.html:29
-setTimeout (async)
-timeout2 @ async-callstack-in-console.html:23
-setTimeout (async)
-timeout1 @ async-callstack-in-console.html:18
-setTimeout (async)
-testFunction @ async-callstack-in-console.html:12
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-    async-callstack-in-console.html:37 Failed to execute 'postMessage' on 'DOMWindow': The target origin provided ('http://www.example.com') does not match the recipient window's origin ('file://').
-        
-tryPostMessage @ async-callstack-in-console.html:37
-timeout3 @ async-callstack-in-console.html:31
-setTimeout (async)
-timeout2 @ async-callstack-in-console.html:23
-setTimeout (async)
-timeout1 @ async-callstack-in-console.html:18
-setTimeout (async)
-testFunction @ async-callstack-in-console.html:12
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