Add standalone drawText for GrTextContext.

include/gpu/GrBitmapTextContext.h

Index: include/gpu/GrBitmapTextContext.h
diff --git a/include/gpu/GrBitmapTextContext.h b/include/gpu/GrBitmapTextContext.h
index e1b3d725a93817b51308c65f9f1a7b243b2a0f73..e1317684a3cd7a0e20471264856736e5cc264e8c 100755
--- a/include/gpu/GrBitmapTextContext.h
+++ b/include/gpu/GrBitmapTextContext.h
@@ -17,17 +17,19 @@ class GrTextStrike;
  */
 class GrBitmapTextContext : public GrTextContext {
 public:
-    virtual void drawPackedGlyph(GrGlyph::PackedID, GrFixed left, GrFixed top,
-                         GrFontScaler*) SK_OVERRIDE;
+    void drawText(const char text[], size_t byteLength, SkScalar x, SkScalar y) SK_OVERRIDE;
+    void drawPosText(const char text[], size_t byteLength,
+                     const SkScalar pos[], SkScalar constY,
+                     int scalarsPerPosition) SK_OVERRIDE;
 
 private:
-    GrBitmapTextContext(GrContext*, const GrPaint&, const SkPaint&);
+    GrBitmapTextContext(SkGpuDevice*, const GrPaint&, const SkPaint&);
     virtual ~GrBitmapTextContext();
     friend class GrTTextContextManager<GrBitmapTextContext>;
 
-    GrContext::AutoMatrix  fAutoMatrix;
     GrTextStrike*          fStrike;
 
+    void drawPackedGlyph(GrGlyph::PackedID, GrFixed left, GrFixed top, GrFontScaler*);
     void flushGlyphs();                 // automatically called by destructor
 
     enum {