Rename GrBitmapTextContextB to GrAtlasTextContext

src/gpu/GrContext.cpp

Index: src/gpu/GrContext.cpp
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index d3817aaff2a3669c7e41b6ea161cec7dab8081b0..b38bc1eea83c1656de881be601dc04e12d702d5c 100755
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -237,7 +237,7 @@ GrTextContext* GrContext::createTextContext(GrRenderTarget* renderTarget,
     } 
 
 #ifdef USE_BITMAP_TEXTBLOBS
-    return GrBitmapTextContextB::Create(this, gpuDevice, leakyProperties);
+    return GrAtlasTextContext::Create(this, gpuDevice, leakyProperties);
 #else
     return GrDistanceFieldTextContext::Create(this, gpuDevice, leakyProperties,
                                               enableDistanceFieldFonts);