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

src/gpu/GrDrawTarget.cpp

Index: src/gpu/GrDrawTarget.cpp
diff --git a/src/gpu/GrDrawTarget.cpp b/src/gpu/GrDrawTarget.cpp
index 8b84edd79aecbea970ca057ca45f121a2d75e1cb..5512f174d7c7cd144d17a3b1500bc9f3299e9186 100644
--- a/src/gpu/GrDrawTarget.cpp
+++ b/src/gpu/GrDrawTarget.cpp
@@ -1016,13 +1016,12 @@
     fShaderDerivativeSupport = false;
     fGeometryShaderSupport = false;
     fDualSourceBlendingSupport = false;
+    fBufferLockSupport = false;
     fPathRenderingSupport = false;
     fDstReadInShaderSupport = false;
     fDiscardRenderTargetSupport = false;
     fReuseScratchTextures = true;
     fGpuTracingSupport = false;
-
-    fMapBufferFlags = kNone_MapFlags;
 
     fMaxRenderTargetSize = 0;
     fMaxTextureSize = 0;
@@ -1041,14 +1040,13 @@
     fShaderDerivativeSupport = other.fShaderDerivativeSupport;
     fGeometryShaderSupport = other.fGeometryShaderSupport;
     fDualSourceBlendingSupport = other.fDualSourceBlendingSupport;
+    fBufferLockSupport = other.fBufferLockSupport;
     fPathRenderingSupport = other.fPathRenderingSupport;
     fDstReadInShaderSupport = other.fDstReadInShaderSupport;
     fDiscardRenderTargetSupport = other.fDiscardRenderTargetSupport;
     fReuseScratchTextures = other.fReuseScratchTextures;
     fGpuTracingSupport = other.fGpuTracingSupport;
 
-    fMapBufferFlags = other.fMapBufferFlags;
-
     fMaxRenderTargetSize = other.fMaxRenderTargetSize;
     fMaxTextureSize = other.fMaxTextureSize;
     fMaxSampleCount = other.fMaxSampleCount;
@@ -1056,26 +1054,6 @@
     memcpy(fConfigRenderSupport, other.fConfigRenderSupport, sizeof(fConfigRenderSupport));
 
     return *this;
-}
-
-static SkString map_flags_to_string(uint32_t flags) {
-    SkString str;
-    if (GrDrawTargetCaps::kNone_MapFlags == flags) {
-        str = "none";
-    } else {
-        SkASSERT(GrDrawTargetCaps::kCanMap_MapFlag & flags);
-        SkDEBUGCODE(flags &= ~GrDrawTargetCaps::kCanMap_MapFlag);
-        str = "can_map";
-
-        if (GrDrawTargetCaps::kSubset_MapFlag & flags) {
-            str.append(" partial");
-        } else {
-            str.append(" full");
-        }
-        SkDEBUGCODE(flags &= ~GrDrawTargetCaps::kSubset_MapFlag);
-    }
-    SkASSERT(0 == flags); // Make sure we handled all the flags.
-    return str;
 }
 
 SkString GrDrawTargetCaps::dump() const {
@@ -1090,6 +1068,7 @@
     r.appendf("Shader Derivative Support    : %s\n", gNY[fShaderDerivativeSupport]);
     r.appendf("Geometry Shader Support      : %s\n", gNY[fGeometryShaderSupport]);
     r.appendf("Dual Source Blending Support : %s\n", gNY[fDualSourceBlendingSupport]);
+    r.appendf("Buffer Lock Support          : %s\n", gNY[fBufferLockSupport]);
     r.appendf("Path Rendering Support       : %s\n", gNY[fPathRenderingSupport]);
     r.appendf("Dst Read In Shader Support   : %s\n", gNY[fDstReadInShaderSupport]);
     r.appendf("Discard Render Target Support: %s\n", gNY[fDiscardRenderTargetSupport]);
@@ -1098,8 +1077,6 @@
     r.appendf("Max Texture Size             : %d\n", fMaxTextureSize);
     r.appendf("Max Render Target Size       : %d\n", fMaxRenderTargetSize);
     r.appendf("Max Sample Count             : %d\n", fMaxSampleCount);
-
-    r.appendf("Map Buffer Support           : %s\n", map_flags_to_string(fMapBufferFlags).c_str());
 
     static const char* kConfigNames[] = {
         "Unknown",  // kUnknown_GrPixelConfig