Split out GrBitmapTextContext from GrTextContext.

src/gpu/SkGpuDevice.cpp

Index: src/gpu/SkGpuDevice.cpp
diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp
index 8cf2e4b664320dea8444be7a3d6da899ae21ee17..b8f7bbb1b9e805715857c3cc236f6b9e34338138 100644
--- a/src/gpu/SkGpuDevice.cpp
+++ b/src/gpu/SkGpuDevice.cpp
@@ -11,7 +11,7 @@
 #include "effects/GrSimpleTextureEffect.h"
 
 #include "GrContext.h"
-#include "GrTextContext.h"
+#include "GrBitmapTextContext.h"
 
 #include "SkGrTexturePixelRef.h"
 
@@ -1770,7 +1770,7 @@ void SkGpuDevice::drawText(const SkDraw& draw, const void* text,
         if (!skPaint2GrPaintShader(this, paint, true, &grPaint)) {
             return;
         }
-        GrTextContext context(fContext, grPaint);
+        GrBitmapTextContext context(fContext, grPaint);
         myDraw.fProcs = this->initDrawForText(&context);
         this->INHERITED::drawText(myDraw, text, byteLength, x, y, paint);
     }
@@ -1793,7 +1793,7 @@ void SkGpuDevice::drawPosText(const SkDraw& draw, const void* text,
         if (!skPaint2GrPaintShader(this, paint, true, &grPaint)) {
             return;
         }
-        GrTextContext context(fContext, grPaint);
+        GrBitmapTextContext context(fContext, grPaint);
         myDraw.fProcs = this->initDrawForText(&context);
         this->INHERITED::drawPosText(myDraw, text, byteLength, pos, constY,
                                      scalarsPerPos, paint);