Add guards around access to font cache global fields.

src/core/SkGlyphCache.cpp

Index: src/core/SkGlyphCache.cpp
diff --git a/src/core/SkGlyphCache.cpp b/src/core/SkGlyphCache.cpp
index 30d00b2463aa6398e142a7eb895262ceaa28191e..6d978a6b5fd2d53302b9724693e9b48868c6b7c8 100644
--- a/src/core/SkGlyphCache.cpp
+++ b/src/core/SkGlyphCache.cpp
@@ -470,6 +470,21 @@ void SkGlyphCache::invokeAndRemoveAuxProcs() {
 ///////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////
 
+size_t SkGlyphCache_Globals::getTotalMemoryUsed() const {
+    SkAutoExclusive ac(fLock);
+    return fTotalMemoryUsed;
+}
+
+int SkGlyphCache_Globals::getCacheCountUsed() const {
+    SkAutoExclusive ac(fLock);
+    return fCacheCount;
+}
+
+int SkGlyphCache_Globals::getCacheCountLimit() const {
+    SkAutoExclusive ac(fLock);
+    return fCacheCountLimit;
+}
+
 size_t SkGlyphCache_Globals::setCacheSizeLimit(size_t newLimit) {
     static const size_t minLimit = 256 * 1024;
     if (newLimit < minLimit) {
@@ -484,6 +499,11 @@ size_t SkGlyphCache_Globals::setCacheSizeLimit(size_t newLimit) {
     return prevLimit;
 }
 
+size_t  SkGlyphCache_Globals::getCacheSizeLimit() const {
+    SkAutoExclusive ac(fLock);
+    return fCacheSizeLimit;
+}
+
 int SkGlyphCache_Globals::setCacheCountLimit(int newCount) {
     if (newCount < 0) {
         newCount = 0;