Remove forceRenderTargetFlush (unused)

src/gpu/gl/GrGpuGL.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "GrGpuGL.h"
 #include "GrGLStencilBuffer.h"
@@ skipping 1333 matching lines @@
     fScissorState.fEnabled = true;
     fScissorState.fRect = rect;
     this->flushScissor();
 
     GL_CALL(StencilMask((uint32_t) clipStencilMask));
     GL_CALL(ClearStencil(value));
     GL_CALL(Clear(GR_GL_STENCIL_BUFFER_BIT));
     fHWStencilSettings.invalidate();
 }
 
-void GrGpuGL::onForceRenderTargetFlush() {
-    this->flushRenderTarget(&SkIRect::EmptyIRect());
-}
-
 bool GrGpuGL::readPixelsWillPayForYFlip(GrRenderTarget* renderTarget,
                                         int left, int top,
                                         int width, int height,
                                         GrPixelConfig config,
                                         size_t rowBytes) const {
     // If this rendertarget is aready TopLeft, we don't need to flip.
     if (kTopLeft_GrSurfaceOrigin == renderTarget->origin()) {
         return false;
     }
 
@@ skipping 1425 matching lines @@
             this->setVertexArrayID(gpu, 0);
         }
         int attrCount = gpu->glCaps().maxVertexAttributes();
         if (fDefaultVertexArrayAttribState.count() != attrCount) {
             fDefaultVertexArrayAttribState.resize(attrCount);
         }
         attribState = &fDefaultVertexArrayAttribState;
     }
     return attribState;
 }