cc: Use highp precision for texture coords if available and needed

cc/output/program_binding.h

 // Copyright 2011 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.
 
 #ifndef CC_OUTPUT_PROGRAM_BINDING_H_
 #define CC_OUTPUT_PROGRAM_BINDING_H_
 
 #include <string>
 
 #include "base/logging.h"
+#include "cc/output/shader.h"
 
 namespace WebKit { class WebGraphicsContext3D; }
 
 namespace cc {
 
 class ProgramBindingBase {
  public:
   ProgramBindingBase();
   ~ProgramBindingBase();
 
@@ skipping 18 matching lines @@
 
   unsigned program_;
   unsigned vertex_shader_id_;
   unsigned fragment_shader_id_;
   bool initialized_;
 };
 
 template <class VertexShader, class FragmentShader>
 class ProgramBinding : public ProgramBindingBase {
  public:
-  explicit ProgramBinding(WebKit::WebGraphicsContext3D* context) {
-    ProgramBindingBase::Init(context,
-                             vertex_shader_.getShaderString(),
-                             fragment_shader_.getShaderString());
+  explicit ProgramBinding(WebKit::WebGraphicsContext3D* context,
+                          TexCoordPrecision precision) {
+    ProgramBindingBase::Init(
+        context,
+        vertex_shader_.getShaderString(context),
+        fragment_shader_.getShaderString(context, precision));
   }
 
   void Initialize(WebKit::WebGraphicsContext3D* context,
                   bool using_bind_uniform) {
     DCHECK(context);
     DCHECK(!initialized_);
 
     if (IsContextLost(context))
       return;
 
@@ skipping 18 matching lines @@
   const FragmentShader& fragment_shader() const { return fragment_shader_; }
 
  private:
   VertexShader vertex_shader_;
   FragmentShader fragment_shader_;
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_PROGRAM_BINDING_H_