Start canonicalizing color for all A8 textblobs

src/core/SkTextBlob.cpp

Index: src/core/SkTextBlob.cpp
diff --git a/src/core/SkTextBlob.cpp b/src/core/SkTextBlob.cpp
index 3d396deba5cb4ce8fe84daeff52b64e369ddb0f4..6ea081d7647d776b2ea87e515fa29f86810bd963 100644
--- a/src/core/SkTextBlob.cpp
+++ b/src/core/SkTextBlob.cpp
@@ -47,6 +47,9 @@ public:
     bool operator!=(const RunFont& other) const {
         return !(*this == other);
     }
+
+    uint32_t flags() const { return fFlags; }
+
 private:
     const static uint32_t kFlagsMask =
         SkPaint::kAntiAlias_Flag          |
@@ -343,6 +346,10 @@ void SkTextBlob::RunIterator::applyFontToPaint(SkPaint* paint) const {
     fCurrentRun->font().applyToPaint(paint);
 }
 
+bool SkTextBlob::RunIterator::isLCD() const {
+    return SkToBool(fCurrentRun->font().flags() & SkPaint::kLCDRenderText_Flag);
+}
+
 SkTextBlobBuilder::SkTextBlobBuilder()
     : fStorageSize(0)
     , fStorageUsed(0)