Revert r2584 (new test fails in fixed pt builds)



git-svn-id: http://skia.googlecode.com/svn/trunk@2585 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrGpu.cpp b/src/gpu/GrGpu.cpp
index 1fc8d47..f0808d3 100644
--- a/src/gpu/GrGpu.cpp
+++ b/src/gpu/GrGpu.cpp
@@ -221,12 +221,10 @@
 
 bool GrGpu::readPixels(GrRenderTarget* target,
                        int left, int top, int width, int height,
-                       GrPixelConfig config, void* buffer,
-                       size_t rowBytes) {
+                       GrPixelConfig config, void* buffer) {
 
     this->handleDirtyContext();
-    return this->onReadPixels(target, left, top, width, height,
-                              config, buffer, rowBytes);
+    return this->onReadPixels(target, left, top, width, height, config, buffer);
 }
 
 ////////////////////////////////////////////////////////////////////////////////