Refactor GrBufferAllocPools to use resource cache

src/gpu/GrCaps.cpp

Index: src/gpu/GrCaps.cpp
diff --git a/src/gpu/GrCaps.cpp b/src/gpu/GrCaps.cpp
index f2e88b01c47d754c89e894fcf62b4580048eae16..900bd65cc2a3eb3b24aedecc8ca64a2312c4fd71 100644
--- a/src/gpu/GrCaps.cpp
+++ b/src/gpu/GrCaps.cpp
@@ -86,6 +86,7 @@ GrCaps::GrCaps(const GrContextOptions& options) {
     fStencilWrapOpsSupport = false;
     fDiscardRenderTargetSupport = false;
     fReuseScratchTextures = true;
+    fReuseScratchBuffers = true;
     fGpuTracingSupport = false;
     fCompressedTexSubImageSupport = false;
     fOversizedStencilSupport = false;
@@ -146,6 +147,7 @@ SkString GrCaps::dump() const {
     r.appendf("Stencil Wrap Ops  Support          : %s\n", gNY[fStencilWrapOpsSupport]);
     r.appendf("Discard Render Target Support      : %s\n", gNY[fDiscardRenderTargetSupport]);
     r.appendf("Reuse Scratch Textures             : %s\n", gNY[fReuseScratchTextures]);
+    r.appendf("Reuse Scratch Buffers              : %s\n", gNY[fReuseScratchBuffers]);
     r.appendf("Gpu Tracing Support                : %s\n", gNY[fGpuTracingSupport]);
     r.appendf("Compressed Update Support          : %s\n", gNY[fCompressedTexSubImageSupport]);
     r.appendf("Oversized Stencil Support          : %s\n", gNY[fOversizedStencilSupport]);