Replace Error(GL_NO_ERROR) with NoError().

In order to make the errors be consistent throughout ANGLE.

BUG=angleproject:1686

Change-Id: I0a2d86091d640aedeac94beae345c1fb6971b00d
Reviewed-on: https://chromium-review.googlesource.com/424835
Commit-Queue: Yunchao He <yunchao.he@intel.com>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
diff --git a/src/libANGLE/renderer/gl/QueryGL.cpp b/src/libANGLE/renderer/gl/QueryGL.cpp
index c9f9aee..9ed36be 100644
--- a/src/libANGLE/renderer/gl/QueryGL.cpp
+++ b/src/libANGLE/renderer/gl/QueryGL.cpp
@@ -99,7 +99,7 @@
     mFunctions->queryCounter(query, GL_TIMESTAMP);
     mPendingQueries.push_back(query);
 
-    return gl::Error(GL_NO_ERROR);
+    return gl::NoError();
 }
 
 template <typename T>
@@ -116,7 +116,7 @@
     ASSERT(mPendingQueries.empty());
     *params = static_cast<T>(mResultSum);
 
-    return gl::Error(GL_NO_ERROR);
+    return gl::NoError();
 }
 
 gl::Error StandardQueryGL::getResult(GLint *params)
@@ -150,7 +150,7 @@
     }
 
     *available = mPendingQueries.empty();
-    return gl::Error(GL_NO_ERROR);
+    return gl::NoError();
 }
 
 gl::Error StandardQueryGL::pause()
@@ -170,7 +170,7 @@
         return error;
     }
 
-    return gl::Error(GL_NO_ERROR);
+    return gl::NoError();
 }
 
 gl::Error StandardQueryGL::resume()
@@ -188,7 +188,7 @@
         mStateManager->beginQuery(mType, mActiveQuery);
     }
 
-    return gl::Error(GL_NO_ERROR);
+    return gl::NoError();
 }
 
 gl::Error StandardQueryGL::flush(bool force)
@@ -202,7 +202,7 @@
             mFunctions->getQueryObjectuiv(id, GL_QUERY_RESULT_AVAILABLE, &resultAvailable);
             if (resultAvailable == GL_FALSE)
             {
-                return gl::Error(GL_NO_ERROR);
+                return gl::NoError();
             }
         }
 
@@ -227,7 +227,7 @@
         mPendingQueries.pop_front();
     }
 
-    return gl::Error(GL_NO_ERROR);
+    return gl::NoError();
 }
 
 class SyncProviderGL