remove template c++11'ism in Heap.h

Followup to CL 486193002 to remove default arguments from template types,
which is only allowed in c++11 and later (and we haven't officially switched
to c++11 yet afaik).

Review URL: https://codereview.chromium.org/559733004

git-svn-id: svn://svn.chromium.org/blink/trunk@181719 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/platform/heap/Heap.h

@@ -1103,7 +1103,10 @@ public:
     static bool weakTableRegistered(const void*);
 #endif
 
-    template<typename T, typename HeapTraits = HeapTypeTrait<T> > static Address allocate(size_t);
+    template<typename T, typename HeapTraits> static Address allocate(size_t);
+    // FIXME: remove this once c++11 is allowed everywhere:
+    template<typename T> static Address allocate(size_t);
+
     template<typename T> static Address reallocate(void* previous, size_t);
 
     static void collectGarbage(ThreadState::StackState);
@@ -1573,6 +1576,12 @@ Address Heap::allocate(size_t size)
     return static_cast<typename HeapTraits::HeapType*>(heap)->allocate(size, gcInfo);
 }
 
+template<typename T>
+Address Heap::allocate(size_t size)
+{
+    return allocate<T, HeapTypeTrait<T> >(size);
+}
+
 template<typename T>
 Address Heap::reallocate(void* previous, size_t size)
 {