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

cc/output/program_binding.h

Index: cc/output/program_binding.h
diff --git a/cc/output/program_binding.h b/cc/output/program_binding.h
index 77396cc46974b56a374174f5cada599b5562a467..9dca5f2623bd73fd325b53c7d1cda1624c343a55 100644
--- a/cc/output/program_binding.h
+++ b/cc/output/program_binding.h
@@ -8,6 +8,7 @@
 #include <string>
 
 #include "base/logging.h"
+#include "cc/output/shader.h"
 
 namespace WebKit { class WebGraphicsContext3D; }
 
@@ -46,10 +47,12 @@ class ProgramBindingBase {
 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,