Use highp for gpu bezier effects

src/gpu/gl/builders/GrGLShaderBuilder.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLShaderBuilder_DEFINED
 #define GrGLShaderBuilder_DEFINED
 
@@ skipping 76 matching lines @@
 
     void codeAppend(const char* str) { fCode.append(str); }
 
     void codePrependf(const char format[], ...) SK_PRINTF_LIKE(2, 3) {
        va_list args;
        va_start(args, format);
        fCode.prependVAList(format, args);
        va_end(args);
     }
 
+    /**
+     * Appends a variable declaration to one of the shaders
+     */
+    void declAppend(const GrGLShaderVar& var);
+
     /** Emits a helper function outside of main() in the fragment shader. */
     void emitFunction(GrSLType returnType,
                       const char* name,
                       int argCnt,
                       const GrGLShaderVar* args,
                       const char* body,
                       SkString* outName);
 
     /*
      * Get parent builder for adding uniforms
@@ skipping 54 matching lines @@
 public:
     GrGLFullShaderBuilder(GrGLFullProgramBuilder* program);
 
     GrGLFullProgramBuilder* fullProgramBuilder() { return fFullProgramBuilder; }
 protected:
     GrGLFullProgramBuilder* fFullProgramBuilder;
 private:
     typedef GrGLShaderBuilder INHERITED;
 };
 #endif