Expose a test cryptographicallyRandomValues to UnitTestWebKitClient.

chrome/test/unit/run_all_unittests.cc

Index: chrome/test/unit/run_all_unittests.cc
===================================================================
--- chrome/test/unit/run_all_unittests.cc	(revision 93451)
+++ chrome/test/unit/run_all_unittests.cc	(working copy)
@@ -13,6 +13,11 @@
  public:
   UnitTestWebKitClient() {
   }
+
+  virtual void cryptographicallyRandomValues(
+      unsigned char* buffer, size_t length) {
+    memset(buffer, 0, length);
+  }
 };
 
 // A special test suite that also initializes webkit once for all unittests.