Adding immediate mode draw target for debug

gyp/gpu.gypi

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 # Include this gypi to include all 'gpu' files
 # The parent gyp/gypi file must define
 #       'skia_src_path'     e.g. skia/trunk/src
 #       'skia_include_path' e.g. skia/trunk/include
 #
 # The skia build defines these in common_variables.gypi
@@ skipping 95 matching lines @@
       '<(skia_src_path)/gpu/GrGeometryBuffer.h',
       '<(skia_src_path)/gpu/GrGeometryProcessor.h',
       '<(skia_src_path)/gpu/GrGlyph.h',
       '<(skia_src_path)/gpu/GrGpu.cpp',
       '<(skia_src_path)/gpu/GrGpu.h',
       '<(skia_src_path)/gpu/GrGpuResourceCacheAccess.h',
       '<(skia_src_path)/gpu/GrGpuResourcePriv.h',
       '<(skia_src_path)/gpu/GrGpuResource.cpp',
       '<(skia_src_path)/gpu/GrGpuFactory.cpp',
       '<(skia_src_path)/gpu/GrGpuFactory.h',
+      '<(skia_src_path)/gpu/GrImmediateDrawTarget.cpp',
+      '<(skia_src_path)/gpu/GrImmediateDrawTarget.h',
       '<(skia_src_path)/gpu/GrIndexBuffer.h',
       '<(skia_src_path)/gpu/GrInvariantOutput.cpp',
       '<(skia_src_path)/gpu/GrInOrderCommandBuilder.cpp',
       '<(skia_src_path)/gpu/GrInOrderCommandBuilder.h',
       '<(skia_src_path)/gpu/GrInOrderDrawBuffer.cpp',
       '<(skia_src_path)/gpu/GrInOrderDrawBuffer.h',
       '<(skia_src_path)/gpu/GrLayerCache.cpp',
       '<(skia_src_path)/gpu/GrLayerCache.h',
       '<(skia_src_path)/gpu/GrLayerHoister.cpp',
       '<(skia_src_path)/gpu/GrLayerHoister.h',
@@ skipping 287 matching lines @@
       '<(skia_src_path)/gpu/gl/debug/SkDebugGLContext.cpp',
       '<(skia_src_path)/gpu/gl/debug/SkDebugGLContext.h',
     ],
     'skgpu_null_gl_sources': [
       '<(skia_src_path)/gpu/gl/GrGLCreateNullInterface.cpp',
       '<(skia_src_path)/gpu/gl/SkNullGLContext.cpp',
       '<(skia_include_path)/gpu/gl/SkNullGLContext.h',
     ],
   },
 }