Bug 753784; allow access to the max texture size from FrameLayerBuilder. r=roc

gfx/layers/basic/BasicLayers.h

@@ -146,6 +146,7 @@ public:
   virtual bool IsCompositingCheap() { return false; }
   virtual bool HasShadowManagerInternal() const { return false; }
   bool HasShadowManager() const { return HasShadowManagerInternal(); }
+  virtual PRInt32 GetMaxTextureSize() const { return PR_INT32_MAX; }
 
 protected:
 #ifdef DEBUG
@@ -207,6 +208,8 @@ public:
     return this;
   }
 
+  virtual PRInt32 GetMaxTextureSize() const;
+
   virtual void BeginTransactionWithTarget(gfxContext* aTarget);
   virtual bool EndEmptyTransaction();
   virtual void EndTransaction(DrawThebesLayerCallback aCallback,