Add GPU support for color bitmap fonts

src/gpu/GrBitmapTextContext.cpp

Index: src/gpu/GrBitmapTextContext.cpp
diff --git a/src/gpu/GrBitmapTextContext.cpp b/src/gpu/GrBitmapTextContext.cpp
index 8d955bbb4ca2a60b78c04bc87d82814dd1e90618..a43c4a28746be3551b07d9dd9e68ca97df4293ed 100755
--- a/src/gpu/GrBitmapTextContext.cpp
+++ b/src/gpu/GrBitmapTextContext.cpp
@@ -70,7 +70,10 @@ void GrBitmapTextContext::flushGlyphs() {
                                 GrCustomCoordsTextureEffect::Create(fCurrTexture, params),
                                 kGlyphCoordsAttributeIndex)->unref();
 
-        if (!GrPixelConfigIsAlphaOnly(fCurrTexture->config())) {
+        if (NULL != fStrike && kARGB_GrMaskFormat == fStrike->getMaskFormat()) {
+            drawState->setBlendFunc(fPaint.getSrcBlendCoeff(), fPaint.getDstBlendCoeff());
+            drawState->setColor(0xffffffff);
+        } else if (!GrPixelConfigIsAlphaOnly(fCurrTexture->config())) {
             if (kOne_GrBlendCoeff != fPaint.getSrcBlendCoeff() ||
                 kISA_GrBlendCoeff != fPaint.getDstBlendCoeff() ||
                 fPaint.numColorStages()) {