Revert of Improve tracking of bound FBOs in GrGLGpu.

src/gpu/gl/GrGLCaps.cpp

Index: src/gpu/gl/GrGLCaps.cpp
diff --git a/src/gpu/gl/GrGLCaps.cpp b/src/gpu/gl/GrGLCaps.cpp
index e70e6f04fba39336841b2a38f4e7e3757da1d1eb..9911d53f43c373d54cb88561d4269ea5e5361884 100644
--- a/src/gpu/gl/GrGLCaps.cpp
+++ b/src/gpu/gl/GrGLCaps.cpp
@@ -52,8 +52,6 @@
     fDropsTileOnZeroDivide = false;
     fFBFetchSupport = false;
     fFBFetchNeedsCustomOutput = false;
-    fPreferBindingToReadAndDrawFramebuffer = false;
-
     fFBFetchColorName = NULL;
     fFBFetchExtensionString = NULL;
 
@@ -101,7 +99,6 @@
     fFBFetchNeedsCustomOutput = caps.fFBFetchNeedsCustomOutput;
     fFBFetchColorName = caps.fFBFetchColorName;
     fFBFetchExtensionString = caps.fFBFetchExtensionString;
-    fPreferBindingToReadAndDrawFramebuffer = caps.fPreferBindingToReadAndDrawFramebuffer;
 
     return *this;
 }
@@ -281,12 +278,6 @@
 
     this->initFSAASupport(ctxInfo, gli);
     this->initStencilFormats(ctxInfo);
-
-    // Workaround for Mac/Chromium issue.
-#ifdef SK_BUILD_FOR_MAC
-    // This relies on the fact that initFSAASupport() was already called.
-    fPreferBindingToReadAndDrawFramebuffer = ctxInfo.isChromium() && this->usesMSAARenderBuffers();
-#endif
 
     /**************************************************************************
      * GrDrawTargetCaps fields