Move shader precision modifier check onto GLSLCaps

src/gpu/glsl/GrGLSLCaps.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "GrGLSLCaps.h"
 
 ////////////////////////////////////////////////////////////////////////////////////////////
 
 GrGLSLCaps::GrGLSLCaps(const GrContextOptions& options) {
     fGLSLGeneration = k330_GrGLSLGeneration;
 
     fDropsTileOnZeroDivide = false;
     fFBFetchSupport = false;
     fFBFetchNeedsCustomOutput = false;
     fBindlessTextureSupport = false;
+    fUsesPrecisionModifiers = false;
     fFBFetchColorName = nullptr;
     fFBFetchExtensionString = nullptr;
     fAdvBlendEqInteraction = kNotSupported_AdvBlendEqInteraction;
 }
 
 SkString GrGLSLCaps::dump() const {
     SkString r = INHERITED::dump();
 
     static const char* kAdvBlendEqInteractionStr[] = {
         "Not Supported",
         "Automatic",
         "General Enable",
         "Specific Enables",
     };
     GR_STATIC_ASSERT(0 == kNotSupported_AdvBlendEqInteraction);
     GR_STATIC_ASSERT(1 == kAutomatic_AdvBlendEqInteraction);
     GR_STATIC_ASSERT(2 == kGeneralEnable_AdvBlendEqInteraction);
     GR_STATIC_ASSERT(3 == kSpecificEnables_AdvBlendEqInteraction);
     GR_STATIC_ASSERT(SK_ARRAY_COUNT(kAdvBlendEqInteractionStr) == kLast_AdvBlendEqInteraction + 1);
 
     r.appendf("--- GLSL-Specific ---\n");
 
     r.appendf("FB Fetch Support: %s\n", (fFBFetchSupport ? "YES" : "NO"));
     r.appendf("Drops tile on zero divide: %s\n", (fDropsTileOnZeroDivide ? "YES" : "NO"));
     r.appendf("Bindless texture support: %s\n", (fBindlessTextureSupport ? "YES" : "NO"));
+    r.appendf("Uses precision modifiers: %s\n", (fUsesPrecisionModifiers ? "YES" : "NO"));
     r.appendf("Advanced blend equation interaction: %s\n",
               kAdvBlendEqInteractionStr[fAdvBlendEqInteraction]);
     return r;
 }