Add support for GL_*_shader_framebuffer_fetch

src/gpu/gl/GrGLCaps.h

Index: src/gpu/gl/GrGLCaps.h
===================================================================
--- src/gpu/gl/GrGLCaps.h	(revision 8966)
+++ src/gpu/gl/GrGLCaps.h	(working copy)
@@ -77,8 +77,20 @@
          * GL_MAX_SAMPLES value.
          */
         kES_EXT_MsToTexture_MSFBOType,
+
+        kLast_MSFBOType = kES_EXT_MsToTexture_MSFBOType 
     };
 
+    enum FBFetchType {
+        kNone_FBFetchType,
+        /** GL_EXT_shader_framebuffer_fetch */
+        kEXT_FBFetchType,
+        /** GL_NV_shader_framebuffer_fetch */
+        kNV_FBFetchType,
+
+        kLast_FBFetchType = kNV_FBFetchType,
+    };
+
     enum CoverageAAType {
         /**
          * No coverage sample support
@@ -184,6 +196,8 @@
      */
     const MSAACoverageMode& getMSAACoverageMode(int desiredSampleCount) const;
 
+    FBFetchType fbFetchType() const { return fFBFetchType; }
+
     /**
      * Prints the caps info using GrPrintf.
      */
@@ -323,6 +337,8 @@
     CoverageAAType fCoverageAAType;
     SkTDArray<MSAACoverageMode> fMSAACoverageModes;
 
+    FBFetchType fFBFetchType;
+
     bool fRGBA8RenderbufferSupport : 1;
     bool fBGRAFormatSupport : 1;
     bool fBGRAIsInternalFormat : 1;