Make GrDrawTarget::Caps ref counted and GrGLCaps derive from it.

src/gpu/gl/GrGpuGL.h

Index: src/gpu/gl/GrGpuGL.h
===================================================================
--- src/gpu/gl/GrGpuGL.h	(revision 8359)
+++ src/gpu/gl/GrGpuGL.h	(working copy)
@@ -57,7 +57,7 @@
 
     virtual void abandonResources() SK_OVERRIDE;
 
-    const GrGLCaps& glCaps() const { return fGLContext.info().caps(); }
+    const GrGLCaps& glCaps() const { return *fGLContext.info().caps(); }
 
     // These functions should be used to bind GL objects. They track the GL state and skip redundant
     // bindings. Making the equivalent glBind calls directly will confuse the state tracking.
@@ -218,9 +218,6 @@
     // flushing the scissor after that function is called.
     void flushScissor();
 
-    // Inits GrDrawTarget::Caps, subclass may enable additional caps.
-    void initCaps();
-
     void initFSAASupport();
 
     // determines valid stencil formats
@@ -431,8 +428,6 @@
     // from our loop that tries stencil formats and calls check fb status.
     int fLastSuccessfulStencilFmtIdx;
 
-    bool fPrintedCaps;
-
     typedef GrGpu INHERITED;
 };