Add support for reading non-rendertarget textures.

src/gpu/GrTextStrike.cpp

Index: src/gpu/GrTextStrike.cpp
diff --git a/src/gpu/GrTextStrike.cpp b/src/gpu/GrTextStrike.cpp
index ab7d8f06a668039fe1a1016674417d79d9237c42..e21fd482757d6ae446eef1e3b767b0bff6e975c0 100644
--- a/src/gpu/GrTextStrike.cpp
+++ b/src/gpu/GrTextStrike.cpp
@@ -173,7 +173,6 @@ void GrFontCache::validate() const {
 
 #ifdef SK_DEVELOPER
 void GrFontCache::dump() const {
-/*  Disabled for now
     static int gDumpCount = 0;
     for (int i = 0; i < kMaskFormatCount; ++i) {
         if (NULL != fAtlasMgr[i]) {
@@ -186,7 +185,6 @@ void GrFontCache::dump() const {
         }
     }
     ++gDumpCount;
-*/
 }
 #endif