Increase maximum gpu resources from 1024 to 4096

Pictures with many drawn paths benefit from the increase of the
count. As an example, chalkboard testcase has ~2500 paths, tiger
has ~300.

Bigger objects, like textures, tend to be limited by the cache
byte limit, not item count.

Review URL: https://codereview.chromium.org/991783003

src/gpu/GrResourceCache.cpp

@@ -56,7 +56,7 @@ private:
 
  //////////////////////////////////////////////////////////////////////////////
 
-static const int kDefaultMaxCount = 2 * (1 << 10);
+static const int kDefaultMaxCount = 2 * (1 << 12);
 static const size_t kDefaultMaxSize = 96 * (1 << 20);
 
 GrResourceCache::GrResourceCache()