Added ability to flush context to GrTextBlobCache

src/gpu/GrContext.cpp

Index: src/gpu/GrContext.cpp
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index 2d61f35a4f02151bfc5508513ffb52c89e8c96b4..04e3f8fa9ff16aee0b03f47eaf8b1393a3512ae9 100755
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -137,7 +137,7 @@ void GrContext::initCommon() {
     // GrBatchFontCache will eventually replace GrFontCache
     fBatchFontCache = SkNEW_ARGS(GrBatchFontCache, (this));
 
-    fTextBlobCache.reset(SkNEW(GrTextBlobCache));
+    fTextBlobCache.reset(SkNEW_ARGS(GrTextBlobCache, (TextBlobCacheOverBudgetCB, this)));
 }
 
 GrContext::~GrContext() {
@@ -354,6 +354,17 @@ void GrContext::OverBudgetCB(void* data) {
     context->fFlushToReduceCacheSize = true;
 }
 
+void GrContext::TextBlobCacheOverBudgetCB(void* data) {
+    SkASSERT(data);
+
+    // Unlike the GrResourceCache, TextBlobs are drawn at the SkGpuDevice level, therefore they
+    // cannot use fFlushTorReduceCacheSize because it uses AutoCheckFlush.  The solution is to move
+    // drawText calls to below the GrContext level, but this is not trivial because they call
+    // drawPath on SkGpuDevice
+    GrContext* context = reinterpret_cast<GrContext*>(data);
+    context->flush();
+}
+
 int GrContext::getMaxTextureSize() const {
     return SkTMin(fGpu->caps()->maxTextureSize(), fMaxTextureSizeOverride);
 }