DevTools: fix javascript pretty-printing of semicolon in some cases

third_party/WebKit/LayoutTests/inspector/sources/pretty-print-javascript-7-expected.txt

+Verifies JavaScript pretty-printing functionality.
+
+
+Running: semicolonAfterFunctionExpression
+====== 8< ------
+var onClick = function() {
+    console.log('click!');
+};
+console.log('done');
+
+------ >8 ======
+Correct mapping for <onClick>
+Correct mapping for <function>
+Correct mapping for <console>
+Correct mapping for <log>
+Correct mapping for <click!>
+Correct mapping for <done>
+
+Running: semicolonAfterMultipleFunctionExpressions
+====== 8< ------
+var onStart = function() {
+    a();
+}
+  , onFinish = function() {
+    b();
+};
+
+------ >8 ======
+Correct mapping for <onStart>
+Correct mapping for <onFinish>
+Correct mapping for <a()>
+Correct mapping for <b()>
+
+Running: semicolonAfterEmptyFunctionExpressions
+====== 8< ------
+var onStart = function() {}
+  , delay = 1000
+  , belay = document.activeElement;
+
+------ >8 ======
+Correct mapping for <onStart>
+Correct mapping for <delay>
+Correct mapping for <1000>
+Correct mapping for <belay>
+Correct mapping for <activeElement>
+