Oilpan: Remove Heap::getStats

It is unused.

BUG=420515

Review URL: https://codereview.chromium.org/728753002

git-svn-id: svn://svn.chromium.org/blink/trunk@185353 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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

@@ -2813,19 +2813,6 @@ void Heap::getHeapSpaceSize(uint64_t* objectSpaceSize, uint64_t* allocatedSpaceS
     }
 }
 
-void Heap::getStats(HeapStats* stats)
-{
-    stats->clear();
-    ASSERT(ThreadState::isAnyThreadInGC());
-    ThreadState::AttachedThreadStateSet& threads = ThreadState::attachedThreads();
-    typedef ThreadState::AttachedThreadStateSet::iterator ThreadStateIterator;
-    for (ThreadStateIterator it = threads.begin(), end = threads.end(); it != end; ++it) {
-        HeapStats temp;
-        (*it)->getStats(temp);
-        stats->add(&temp);
-    }
-}
-
 void Heap::getStatsForTesting(HeapStats* stats)
 {
     stats->clear();

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

@@ -967,11 +967,6 @@ public:
     static String createBacktraceString();
 #endif
 
-    // Collect heap stats for all threads attached to the Blink
-    // garbage collector. Should only be called during garbage
-    // collection where threads are known to be at safe points.
-    static void getStats(HeapStats*);
-
     static void getStatsForTesting(HeapStats*);
 
     static void getHeapSpaceSize(uint64_t*, uint64_t*);