Avoid regenerating cached textblobs on integer scrolls

src/gpu/GrDrawTarget.h

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrDrawTarget_DEFINED
 #define GrDrawTarget_DEFINED
 
 #include "GrClip.h"
 #include "GrClipMaskManager.h"
 #include "GrContext.h"
-#include "GrMemoryPool.h"
 #include "GrPathProcessor.h"
 #include "GrPrimitiveProcessor.h"
 #include "GrIndexBuffer.h"
 #include "GrPathRendering.h"
 #include "GrPipelineBuilder.h"
 #include "GrTraceMarker.h"
 #include "GrVertexBuffer.h"
 
 #include "SkClipStack.h"
 #include "SkMatrix.h"
@@ skipping 542 matching lines @@
         GrPendingIOResource<const GrVertexBuffer, kRead_GrIOType> fVertexBuffer;
         GrPendingIOResource<const GrIndexBuffer, kRead_GrIOType>  fIndexBuffer;
     };
 
     /**
      * Used to populate the vertex and index buffer on the draw info before onDraw is called.
      */
     virtual void setDrawBuffers(DrawInfo*, size_t vertexStride) = 0;;
     bool programUnitTest(int maxStages);
 
-    // TODO I should make the bitmapTextBlob cache a thing, which lives on draw target
-    GrMemoryPool* pool() { return &fPool; }
-
 protected:
     friend class GrTargetCommands; // for PipelineInfo
 
     enum GeometrySrcType {
         kNone_GeometrySrcType,     //<! src has not been specified
         kReserved_GeometrySrcType, //<! src was set using reserve*Space
         kBuffer_GeometrySrcType    //<! src was set using set*SourceToBuffer
     };
 
     struct GeometrySrcState {
@@ skipping 214 matching lines @@
     enum {
         kPreallocGeoSrcStateStackCnt = 4,
     };
     SkSTArray<kPreallocGeoSrcStateStackCnt, GeometrySrcState, true> fGeoSrcStateStack;
     // The context owns us, not vice-versa, so this ptr is not ref'ed by DrawTarget.
     GrContext*                                                      fContext;
     // To keep track that we always have at least as many debug marker adds as removes
     int                                                             fGpuTraceMarkerCount;
     GrTraceMarkerSet                                                fActiveTraceMarkers;
     GrTraceMarkerSet                                                fStoredTraceMarkers;
-    GrMemoryPool                                                    fPool;
 
     typedef SkRefCnt INHERITED;
 };
 
 /*
  * This class is JUST for clip mask manager.  Everyone else should just use draw target above.
  */
 class GrClipTarget : public GrDrawTarget {
 public:
     GrClipTarget(GrContext* context) : INHERITED(context) {
@@ skipping 33 matching lines @@
     virtual bool setupClip(GrPipelineBuilder*,
                            GrPipelineBuilder::AutoRestoreFragmentProcessors*,
                            GrPipelineBuilder::AutoRestoreStencil*,
                            GrScissorState* scissorState,
                            const SkRect* devBounds) override;
 
     typedef GrDrawTarget INHERITED;
 };
 
 #endif