Replace factory generation of TextContexts with persistent objects.

src/gpu/GrTextContext.cpp

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrTextContext.h"
 #include "GrContext.h"
 
 #include "SkAutoKern.h"
 #include "SkGlyphCache.h"
 #include "SkGr.h"
 
-GrTextContext::GrTextContext(GrContext* context, const GrPaint& paint,
-                             const SkPaint& skPaint, const SkDeviceProperties& properties) :
-                            fContext(context), fPaint(paint), fSkPaint(skPaint),
-                            fDeviceProperties(properties) {
+GrTextContext::GrTextContext(GrContext* context, const SkDeviceProperties& properties) :
+                            fContext(context), fDeviceProperties(properties), fDrawTarget(NULL) {
+}
 
-    const GrClipData* clipData = context->getClip();
+void GrTextContext::init(const GrPaint& grPaint, const SkPaint& skPaint) {
+    const GrClipData* clipData = fContext->getClip();
 
     SkRect devConservativeBound;
     clipData->fClipStack->getConservativeBounds(
                                      -clipData->fOrigin.fX,
                                      -clipData->fOrigin.fY,
-                                     context->getRenderTarget()->width(),
-                                     context->getRenderTarget()->height(),
+                                     fContext->getRenderTarget()->width(),
+                                     fContext->getRenderTarget()->height(),
                                      &devConservativeBound);
 
     devConservativeBound.roundOut(&fClipRect);
 
-    fDrawTarget = context->getTextTarget();
+    fDrawTarget = fContext->getTextTarget();
+
+    fPaint = grPaint;
+    fSkPaint = skPaint;
 }
 
 //*** change to output positions?
 void GrTextContext::MeasureText(SkGlyphCache* cache, SkDrawCacheProc glyphCacheProc,
                                 const char text[], size_t byteLength, SkVector* stopVector) {
     SkFixed     x = 0, y = 0;
     const char* stop = text + byteLength;
 
     SkAutoKern  autokern;
 
@@ skipping 22 matching lines @@
     if (cache->getAuxProcData(GlyphCacheAuxProc, &auxData)) {
         scaler = (GrFontScaler*)auxData;
     }
     if (NULL == scaler) {
         scaler = SkNEW_ARGS(SkGrFontScaler, (cache));
         cache->setAuxProc(GlyphCacheAuxProc, scaler);
     }
 
     return scaler;
 }