cc: Use highp precision for texture coordinates if available

cc/fake_web_graphics_context_3d.cc

Index: cc/fake_web_graphics_context_3d.cc
diff --git a/cc/fake_web_graphics_context_3d.cc b/cc/fake_web_graphics_context_3d.cc
index cd03d37c09908c541bce13f631f23e53362de6b1..68eb0b6141eb749606387ee94a19fd36f90a6545 100644
--- a/cc/fake_web_graphics_context_3d.cc
+++ b/cc/fake_web_graphics_context_3d.cc
@@ -152,6 +152,16 @@ WebKit::WebString FakeWebGraphicsContext3D::getShaderInfoLog(
   return WebKit::WebString();
 }
 
+void FakeWebGraphicsContext3D::getShaderPrecisionFormat(
+    WebKit::WGC3Denum shadertype,
+    WebKit::WGC3Denum precisiontype,
+    WebKit::WGC3Dint* range,
+    WebKit::WGC3Dint* precision) {
+  range[0] = 0;
+  range[1] = 0;
+  *precision = 0;
+}
+
 WebKit::WebString FakeWebGraphicsContext3D::getShaderSource(
     WebGLId shader) {
   return WebKit::WebString();