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/FramebufferGL.cpp b/src/libANGLE/renderer/gl/FramebufferGL.cpp
index 3d0e900..daa89bf 100644
--- a/src/libANGLE/renderer/gl/FramebufferGL.cpp
+++ b/src/libANGLE/renderer/gl/FramebufferGL.cpp
@@ -160,7 +160,7 @@
                                              attachments, area.x, area.y, area.width, area.height);
     }
 
-    return Error(GL_NO_ERROR);
+    return NoError();
 }
 
 Error FramebufferGL::clear(ContextImpl *context, GLbitfield mask)
@@ -169,7 +169,7 @@
     mStateManager->bindFramebuffer(GL_FRAMEBUFFER, mFramebufferID);
     mFunctions->clear(mask);
 
-    return Error(GL_NO_ERROR);
+    return NoError();
 }
 
 Error FramebufferGL::clearBufferfv(ContextImpl *context,
@@ -181,7 +181,7 @@
     mStateManager->bindFramebuffer(GL_FRAMEBUFFER, mFramebufferID);
     mFunctions->clearBufferfv(buffer, drawbuffer, values);
 
-    return Error(GL_NO_ERROR);
+    return NoError();
 }
 
 Error FramebufferGL::clearBufferuiv(ContextImpl *context,
@@ -193,7 +193,7 @@
     mStateManager->bindFramebuffer(GL_FRAMEBUFFER, mFramebufferID);
     mFunctions->clearBufferuiv(buffer, drawbuffer, values);
 
-    return Error(GL_NO_ERROR);
+    return NoError();
 }
 
 Error FramebufferGL::clearBufferiv(ContextImpl *context,
@@ -205,7 +205,7 @@
     mStateManager->bindFramebuffer(GL_FRAMEBUFFER, mFramebufferID);
     mFunctions->clearBufferiv(buffer, drawbuffer, values);
 
-    return Error(GL_NO_ERROR);
+    return NoError();
 }
 
 Error FramebufferGL::clearBufferfi(ContextImpl *context,
@@ -218,7 +218,7 @@
     mStateManager->bindFramebuffer(GL_FRAMEBUFFER, mFramebufferID);
     mFunctions->clearBufferfi(buffer, drawbuffer, depth, stencil);
 
-    return Error(GL_NO_ERROR);
+    return NoError();
 }
 
 GLenum FramebufferGL::getImplementationColorReadFormat() const