Revert of Fix ReadPixels from float fbo buffer in ES2/WebGL1.

third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp

Index: third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
diff --git a/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp b/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
index 40b3eda9046f2b6e9f1e0fa0f2f105ef18289b39..999af825100a4abb54ef8ccb4109e5fc320d7936 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
+++ b/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
@@ -3520,7 +3520,7 @@
         }
         return true;
     case GL_FLOAT:
-        if (extensionEnabled(OESTextureFloatName) || extensionEnabled(OESTextureHalfFloatName)) {
+        if (extensionEnabled(OESTextureFloatName)) {
             if (buffer && buffer->type() != DOMArrayBufferView::TypeFloat32) {
                 synthesizeGLError(GL_INVALID_OPERATION, "readPixels", "type FLOAT but ArrayBufferView not Float32Array");
                 return false;
@@ -5100,21 +5100,8 @@
 ScriptValue WebGLRenderingContextBase::getIntParameter(ScriptState* scriptState, GLenum pname)
 {
     GLint value = 0;
-    if (!isContextLost()) {
+    if (!isContextLost())
         contextGL()->GetIntegerv(pname, &value);
-        switch (pname) {
-        case GL_IMPLEMENTATION_COLOR_READ_FORMAT:
-        case GL_IMPLEMENTATION_COLOR_READ_TYPE:
-            if (value == 0) {
-                // This indicates read framebuffer is incomplete and an
-                // INVALID_OPERATION has been generated.
-                return ScriptValue::createNull(scriptState);
-            }
-            break;
-        default:
-            break;
-        }
-    }
     return WebGLAny(scriptState, value);
 }