Make GrGLSLProgramBuilder base class for ProgramBuilder

src/gpu/glsl/GrGLSLCaps.h

Index: src/gpu/glsl/GrGLSLCaps.h
diff --git a/src/gpu/glsl/GrGLSLCaps.h b/src/gpu/glsl/GrGLSLCaps.h
index e703fb852384c7b4193b6fb66d6e5fa7ad9e2c8a..68e91b6666599f543eedbc461649e98a4ecb02a5 100755
--- a/src/gpu/glsl/GrGLSLCaps.h
+++ b/src/gpu/glsl/GrGLSLCaps.h
@@ -74,6 +74,10 @@ public:
 
     bool forceHighPrecisionNDSTransform() const { return fForceHighPrecisionNDSTransform; }
 
+    bool canUseMinAndAbsTogether() const { return fCanUseMinAndAbsTogether; }
+
+    bool mustForceNegatedAtanParamToFloat() const { return fMustForceNegatedAtanParamToFloat; }
+
     // Returns the string of an extension that must be enabled in the shader to support
     // derivatives. If nullptr is returned then no extension needs to be enabled. Before calling
     // this function, the caller should check that shaderDerivativeSupport exists.
@@ -81,6 +85,22 @@ public:
         SkASSERT(this->shaderDerivativeSupport());
         return fShaderDerivativeExtensionString;
     }
+    
+    // Returns the string of an extension that will do all necessary coord transfomations needed
+    // when reading the fragment position. If such an extension does not exisits, this function
+    // returns a nullptr, and all transforms of the frag position must be done manually in the
+    // shader.
+    const char* fragCoordConventionsExtensionString() const {
+        return fFragCoordConventionsExtensionString;
+    }
+
+    // This returns the name of an extension that must be enabled in the shader, if such a thing is
+    // required in order to use a secondary output in the shader. This returns a nullptr if no such
+    // extension is required. However, the return value of this function does not say whether dual
+    // source blending is supported.
+    const char* secondaryOutputExtensionString() const {
+        return fSecondaryOutputExtensionString;
+    }
 
     bool mustSwizzleInShader() const { return fMustSwizzleInShader; }
 
@@ -111,9 +131,15 @@ private:
     bool fCanUseAnyFunctionInShader : 1;
     bool fForceHighPrecisionNDSTransform : 1;
 
+    // Used for specific driver bug work arounds
+    bool fCanUseMinAndAbsTogether : 1;
+    bool fMustForceNegatedAtanParamToFloat : 1;
+
     const char* fVersionDeclString;
 
     const char* fShaderDerivativeExtensionString;
+    const char* fFragCoordConventionsExtensionString;
+    const char* fSecondaryOutputExtensionString;
 
     const char* fFBFetchColorName;
     const char* fFBFetchExtensionString;