Use only one GL context per process, share chaches.

Change-Id: Ieabaa25338d2f4b8d4fd90e7401ad6e7452eae11
diff --git a/libs/hwui/PathCache.h b/libs/hwui/PathCache.h
index d09789f..522e5e0 100644
--- a/libs/hwui/PathCache.h
+++ b/libs/hwui/PathCache.h
@@ -95,6 +95,7 @@
  */
 class PathCache: public OnEntryRemoved<PathCacheEntry, PathTexture*> {
 public:
+    PathCache();
     PathCache(uint32_t maxByteSize);
     ~PathCache();
 
@@ -135,6 +136,8 @@
 
     PathTexture* addTexture(const PathCacheEntry& entry, const SkPath *path, const SkPaint* paint);
 
+    void init();
+
     GenerationCache<PathCacheEntry, PathTexture*> mCache;
 
     uint32_t mSize;