[DevTools] Extract platform module.

Source/devtools/front_end/platform/utilities.js

Index: Source/devtools/front_end/platform/utilities.js
diff --git a/Source/devtools/front_end/common/utilities.js b/Source/devtools/front_end/platform/utilities.js
similarity index 98%
rename from Source/devtools/front_end/common/utilities.js
rename to Source/devtools/front_end/platform/utilities.js
index 3f62618eda1d245da3a2ba8e41bb28d0127face4..7c9301cf5abe8388163e879d5cef35f521994f35 100644
--- a/Source/devtools/front_end/common/utilities.js
+++ b/Source/devtools/front_end/platform/utilities.js
@@ -27,6 +27,17 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+// FIXME: This performance optimization should be moved to blink so that all developers could enjoy it.
+// console is retrieved with V8Window.getAttribute method which is slow. Here we copy it to a js variable for faster access.
+console = console;
+console.__originalAssert = console.assert;
+console.assert = function(value, message)
+{
+    if (value)
+        return;
+    console.__originalAssert(value, message);
+}
+
 /** @typedef {Array|NodeList|Arguments|{length: number}} */
 var ArrayLike;