remove GrAllocPool

src/gpu/GrMemoryPool.cpp

Index: src/gpu/GrMemoryPool.cpp
diff --git a/src/gpu/GrMemoryPool.cpp b/src/gpu/GrMemoryPool.cpp
index 5009f20152d5d7813956d4539f7e86c21adc7a48..ea64c2994af82dd195b3a22460580ec2eff674b7 100644
--- a/src/gpu/GrMemoryPool.cpp
+++ b/src/gpu/GrMemoryPool.cpp
@@ -102,6 +102,27 @@ void GrMemoryPool::release(void* p) {
     VALIDATE;
 }
 
+void GrMemoryPool::releaseAll() {
+    VALIDATE;
+    while (fTail->fPrev) {
+        BlockHeader* prev = fTail->fPrev;
+        SkDEBUGCODE(fAllocationCnt -= fTail->fLiveCount);
+        DeleteBlock(fTail);
+        fTail = prev;
+        fTail->fNext = NULL;
+    }
+    // now 'free' head block
+    SkDEBUGCODE(fAllocationCnt -= fHead->fLiveCount);
+    fHead->fCurrPtr = reinterpret_cast<intptr_t>(fHead) +
+                        kHeaderSize;
+    fHead->fLiveCount = 0;
+    fHead->fFreeSize = fPreallocSize;
+    SkASSERT(0 == fAllocationCnt);
+    SkASSERT(fHead == fTail);
+    SkASSERT(0 == fHead->fLiveCount);
+    VALIDATE;
+}
+
 GrMemoryPool::BlockHeader* GrMemoryPool::CreateBlock(size_t size) {
     BlockHeader* block =
         reinterpret_cast<BlockHeader*>(sk_malloc_throw(size + kHeaderSize));