Add WTF::DiscardableMemory.

Source/wtf/WTFPlatform.h

Index: Source/wtf/WTFPlatform.h
diff --git a/Source/core/testing/UnitTestHelpers.cpp b/Source/wtf/WTFPlatform.h
similarity index 71%
copy from Source/core/testing/UnitTestHelpers.cpp
copy to Source/wtf/WTFPlatform.h
index 8c5bc5bbe4552847c5199f067aa587a7d748e073..035972e79fe3b4e344b441a7f3117ae1177bdf0e 100644
--- a/Source/core/testing/UnitTestHelpers.cpp
+++ b/Source/wtf/WTFPlatform.h
@@ -17,35 +17,34 @@
  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include "config.h"
-#include "core/testing/UnitTestHelpers.h"
-
-#include "public/platform/Platform.h"
-#include "public/platform/WebThread.h"
+#ifndef WTF_WTFPlatform_h
+#define WTF_WTFPlatform_h
 
+#include "wtf/Assertions.h"
+#include "wtf/DiscardableMemory.h"
+#include "wtf/PassOwnPtr.h"
 
-namespace WebCore {
-namespace testing {
+namespace WTF {
 
-class QuitTask : public blink::WebThread::Task {
+class WTFPlatform {
 public:
-    virtual void run()
-    {
-        blink::Platform::current()->currentThread()->exitRunLoop();
-    }
+    virtual ~WTFPlatform() { }
+
+    virtual PassOwnPtr<DiscardableMemory> allocateAndLockDiscardableMemory(size_t bytes) = 0;
+
+    static WTFPlatform* getInstance() { return s_instance; }
+    static void setInstance(WTFPlatform* instance) { ASSERT(!s_instance); s_instance = instance; }
+
+private:
+    static WTFPlatform* s_instance;
 };
 
-void runPendingTasks()
-{
-    blink::Platform::current()->currentThread()->postTask(new QuitTask);
-    blink::Platform::current()->currentThread()->enterRunLoop();
-}
+} // namespace WTF
 
-}
-}
+#endif