cc: Cache highp_threshold in TexCoordPrecisionRequired

cc/output/shader_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/output/shader.h"
 
 #include "cc/debug/fake_web_graphics_context_3d.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/size.h"
 
 namespace cc {
 
 TEST(ShaderTest, HighpThresholds) {
   // The FakeWebGraphicsContext3D always uses a mediump precision of 10 bits
   // which corresponds to a native highp threshold of 2^10 = 1024
   FakeWebGraphicsContext3D context;
 
+  int threshold_cache = 0;
   int threshold_min;
   gfx::Point closePoint(512, 512);
   gfx::Size smallSize(512, 512);
   gfx::Point farPoint(2560, 2560);
   gfx::Size bigSize(2560, 2560);
 
   threshold_min = 0;
-  EXPECT_EQ(TexCoordPrecisionMedium,
-            TexCoordPrecisionRequired(&context, threshold_min, closePoint));
-  EXPECT_EQ(TexCoordPrecisionMedium,
-            TexCoordPrecisionRequired(&context, threshold_min, smallSize));
-  EXPECT_EQ(TexCoordPrecisionHigh,
-            TexCoordPrecisionRequired(&context, threshold_min, farPoint));
-  EXPECT_EQ(TexCoordPrecisionHigh,
-            TexCoordPrecisionRequired(&context, threshold_min, bigSize));
+  EXPECT_EQ(TexCoordPrecisionMedium, TexCoordPrecisionRequired(
+      &context, &threshold_cache, threshold_min, closePoint));
+  EXPECT_EQ(TexCoordPrecisionMedium, TexCoordPrecisionRequired(
+      &context, &threshold_cache, threshold_min, smallSize));
+  EXPECT_EQ(TexCoordPrecisionHigh, TexCoordPrecisionRequired(
+      &context, &threshold_cache, threshold_min, farPoint));
+  EXPECT_EQ(TexCoordPrecisionHigh, TexCoordPrecisionRequired(
+      &context, &threshold_cache, threshold_min, bigSize));
 
   threshold_min = 3000;
-  EXPECT_EQ(TexCoordPrecisionMedium,
-            TexCoordPrecisionRequired(&context, threshold_min, closePoint));
-  EXPECT_EQ(TexCoordPrecisionMedium,
-            TexCoordPrecisionRequired(&context, threshold_min, smallSize));
-  EXPECT_EQ(TexCoordPrecisionMedium,
-            TexCoordPrecisionRequired(&context, threshold_min, farPoint));
-  EXPECT_EQ(TexCoordPrecisionMedium,
-            TexCoordPrecisionRequired(&context, threshold_min, bigSize));
+  EXPECT_EQ(TexCoordPrecisionMedium, TexCoordPrecisionRequired(
+      &context, &threshold_cache, threshold_min, closePoint));
+  EXPECT_EQ(TexCoordPrecisionMedium, TexCoordPrecisionRequired(
+      &context, &threshold_cache, threshold_min, smallSize));
+  EXPECT_EQ(TexCoordPrecisionMedium, TexCoordPrecisionRequired(
+      &context, &threshold_cache, threshold_min, farPoint));
+  EXPECT_EQ(TexCoordPrecisionMedium, TexCoordPrecisionRequired(
+      &context, &threshold_cache, threshold_min, bigSize));
 }
 
 }  // namespace cc