Remove redundant FBO query methods.

Several query methods simply wrapped a NULL check with a default
return value. Most of these safety checks were unnecessary.

BUG=angle:660

Change-Id: I0ac6897f06be082c8efab8721920d1b51ba999ee
Reviewed-on: https://chromium-review.googlesource.com/205606
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>
diff --git a/src/libGLESv2/ProgramBinary.cpp b/src/libGLESv2/ProgramBinary.cpp
index 9635b8e..2efe8b7 100644
--- a/src/libGLESv2/ProgramBinary.cpp
+++ b/src/libGLESv2/ProgramBinary.cpp
@@ -199,7 +199,7 @@
     std::vector<GLenum> outputs(IMPLEMENTATION_MAX_DRAW_BUFFERS);
     for (size_t outputIndex = 0; outputIndex < IMPLEMENTATION_MAX_DRAW_BUFFERS; outputIndex++)
     {
-        if (fbo->getColorbufferType(outputIndex) != GL_NONE)
+        if (fbo->getColorbuffer(outputIndex) != NULL)
         {
             // Always output floats for now
             outputs[outputIndex] = GL_FLOAT;