Revert of Add support for glMapBufferRange. Use glMapBufferRange and glMapBufferSubData.

src/gpu/gl/GrGLCaps.h

Index: src/gpu/gl/GrGLCaps.h
diff --git a/src/gpu/gl/GrGLCaps.h b/src/gpu/gl/GrGLCaps.h
index ea0f41245d20bedea2d4a0fa76f95510a09a024e..48925d48b4650b5db4631a2267ac2c27bed7693d 100644
--- a/src/gpu/gl/GrGLCaps.h
+++ b/src/gpu/gl/GrGLCaps.h
@@ -86,15 +86,6 @@
         kLast_InvalidateFBType = kInvalidate_InvalidateFBType
     };
 
-    enum MapBufferType {
-        kNone_MapBufferType,
-        kMapBuffer_MapBufferType,         // glMapBuffer()
-        kMapBufferRange_MapBufferType,    // glMapBufferRange()
-        kChromium_MapBufferType,          // GL_CHROMIUM_map_sub
-
-        kLast_MapBufferType = kChromium_MapBufferType,
-    };
-
     /**
      * Creates a GrGLCaps that advertises no support for any extensions,
      * formats, etc. Call init to initialize from a GrGLContextInfo.
@@ -178,8 +169,10 @@
 
     InvalidateFBType invalidateFBType() const { return fInvalidateFBType; }
 
-    /// What type of buffer mapping is supported?
-    MapBufferType mapBufferType() const { return fMapBufferType; }
+    /**
+     * Returs a string containeng the caps info.
+     */
+    virtual SkString dump() const SK_OVERRIDE;
 
     /**
      * Gets an array of legal stencil formats. These formats are not guaranteed
@@ -265,10 +258,8 @@
 
     bool dropsTileOnZeroDivide() const { return fDropsTileOnZeroDivide; }
 
-    /**
-     * Returns a string containing the caps info.
-     */
-    virtual SkString dump() const SK_OVERRIDE;
+    /// Is GL_CHROMIUM_map_sub supported?
+    bool mapSubSupport() const { return fMapSubSupport; }
 
 private:
     /**
@@ -331,7 +322,6 @@
     MSFBOType           fMSFBOType;
     FBFetchType         fFBFetchType;
     InvalidateFBType    fInvalidateFBType;
-    MapBufferType       fMapBufferType;
 
     bool fRGBA8RenderbufferSupport : 1;
     bool fBGRAFormatSupport : 1;
@@ -352,6 +342,7 @@
     bool fIsCoreProfile : 1;
     bool fFullClearIsFree : 1;
     bool fDropsTileOnZeroDivide : 1;
+    bool fMapSubSupport : 1;
 
     typedef GrDrawTargetCaps INHERITED;
 };