Clean up geterror / log macros and globals for debugging. disable geterror in chrome by default.

Review URL: http://codereview.appspot.com/4170058/

git-svn-id: http://skia.googlecode.com/svn/trunk@810 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/include/GrGLConfig_chrome.h b/gpu/include/GrGLConfig_chrome.h
index e61a66c..6d5f21c 100644
--- a/gpu/include/GrGLConfig_chrome.h
+++ b/gpu/include/GrGLConfig_chrome.h
@@ -18,4 +18,7 @@
 // chrome always assumes BGRA
 #define GR_GL_32BPP_COLOR_FORMAT    GR_BGRA
 
+// glGetError() forces a sync with gpu process on chrome
+#define GR_GL_CHECK_ERROR_START     0
+
 #endif