Fix GLSL int to float error in arc code in GrOvalRenderer.

src/gpu/GrOvalRenderer.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrOvalRenderer.h"
 
 #include "GrBatchFlushState.h"
@@ skipping 172 matching lines @@
                 fragBuilder->codeAppendf("    %s = vec4(normalize(circleEdge.xy), distanceToOuterEdge, %s);",
                                          args.fDistanceVectorName, innerEdgeDistance);
                 fragBuilder->codeAppend ("}");
             }
             if (cgp.fInClipPlane) {
                 fragBuilder->codeAppend("float clip = clamp(circleEdge.z * dot(circleEdge.xy, clipPlane.xy) + clipPlane.z, 0.0, 1.0);");
                 if (cgp.fInIsectPlane) {
                     fragBuilder->codeAppend("clip *= clamp(circleEdge.z * dot(circleEdge.xy, isectPlane.xy) + isectPlane.z, 0.0, 1.0);");
                 }
                 if (cgp.fInUnionPlane) {
-                    fragBuilder->codeAppend("clip += (1-clip)*clamp(circleEdge.z * dot(circleEdge.xy, unionPlane.xy) + unionPlane.z, 0.0, 1.0);");
+                    fragBuilder->codeAppend("clip += (1.0 - clip)*clamp(circleEdge.z * dot(circleEdge.xy, unionPlane.xy) + unionPlane.z, 0.0, 1.0);");
                 }
                 fragBuilder->codeAppend("edgeAlpha *= clip;");
             }
             fragBuilder->codeAppendf("%s = vec4(edgeAlpha);", args.fOutputCoverage);
         }
 
         static void GenKey(const GrGeometryProcessor& gp,
                            const GrGLSLCaps&,
                            GrProcessorKeyBuilder* b) {
             const CircleGeometryProcessor& cgp = gp.cast<CircleGeometryProcessor>();
@@ skipping 1757 matching lines @@
 }
 
 DRAW_BATCH_TEST_DEFINE(RRectBatch) {
     SkMatrix viewMatrix = GrTest::TestMatrixRectStaysRect(random);
     GrColor color = GrRandomColor(random);
     const SkRRect& rrect = GrTest::TestRRectSimple(random);
     return create_rrect_batch(color, viewMatrix, rrect, GrTest::TestStrokeRec(random));
 }
 
 #endif