Change GrTextContext fallbacks to be a linked list chain.

src/gpu/GrBitmapTextContext.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrBitmapTextContext.h"
 #include "GrAtlas.h"
 #include "GrDrawTarget.h"
@@ skipping 48 matching lines @@
     fCurrTexture = NULL;
     fCurrVertex = 0;
     fEffectTextureUniqueID = SK_InvalidUniqueID;
 
     fVertices = NULL;
     fMaxVertices = 0;
 
     fVertexBounds.setLargestInverted();
 }
 
+GrBitmapTextContext* GrBitmapTextContext::Create(GrContext* context,
+                                                 const SkDeviceProperties& props) {
+    return SkNEW_ARGS(GrBitmapTextContext, (context, props));
+}
+
 GrBitmapTextContext::~GrBitmapTextContext() {
     this->flush();
 }
 
 bool GrBitmapTextContext::canDraw(const SkPaint& paint) {
     return !SkDraw::ShouldDrawTextAsPaths(paint, fContext->getMatrix());
 }
 
 inline void GrBitmapTextContext::init(const GrPaint& paint, const SkPaint& skPaint) {
     GrTextContext::init(paint, skPaint);
 
     fStrike = NULL;
 
     fCurrTexture = NULL;
     fCurrVertex = 0;
 
     fVertices = NULL;
     fMaxVertices = 0;
 }
 
-void GrBitmapTextContext::drawText(const GrPaint& paint, const SkPaint& skPaint,
+void GrBitmapTextContext::onDrawText(const GrPaint& paint, const SkPaint& skPaint,
                                    const char text[], size_t byteLength,
                                    SkScalar x, SkScalar y) {
     SkASSERT(byteLength == 0 || text != NULL);
 
     // nothing to draw
     if (text == NULL || byteLength == 0 /*|| fRC->isEmpty()*/) {
         return;
     }
 
     this->init(paint, skPaint);
@@ skipping 70 matching lines @@
                               fontScaler);
         }
 
         fx += glyph.fAdvanceX;
         fy += glyph.fAdvanceY;
     }
 
     this->finish();
 }
 
-void GrBitmapTextContext::drawPosText(const GrPaint& paint, const SkPaint& skPaint,
+void GrBitmapTextContext::onDrawPosText(const GrPaint& paint, const SkPaint& skPaint,
                                       const char text[], size_t byteLength,
                                       const SkScalar pos[], int scalarsPerPosition,
                                       const SkPoint& offset) {
     SkASSERT(byteLength == 0 || text != NULL);
     SkASSERT(1 == scalarsPerPosition || 2 == scalarsPerPosition);
 
     // nothing to draw
     if (text == NULL || byteLength == 0/* || fRC->isEmpty()*/) {
         return;
     }
@@ skipping 412 matching lines @@
         SkSafeSetNull(fCurrTexture);
     }
 }
 
 inline void GrBitmapTextContext::finish() {
     this->flush();
 
     GrTextContext::finish();
 }