GPU process clients can perform a "shallow" finish.

gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h

Index: gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h
===================================================================
--- gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h	(revision 207109)
+++ gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h	(working copy)
@@ -86,13 +86,13 @@
   { 0x2601, "GL_LINEAR", },
   { 0x8C03, "GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG", },
   { 0x9242, "GL_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM", },
+  { 0x88BA, "GL_READ_WRITE", },
   { 0x88BB, "GL_BUFFER_ACCESS_OES", },
   { 0x88BC, "GL_BUFFER_MAPPED_OES", },
   { 0x88BD, "GL_BUFFER_MAP_POINTER_OES", },
   { 0x0C10, "GL_SCISSOR_BOX", },
   { 0x0C11, "GL_SCISSOR_TEST", },
   { 0x80000000, "GL_MULTISAMPLE_BUFFER_BIT7_QCOM", },
-  { 0x300E, "GL_CONTEXT_LOST", },
   { 0x02000000, "GL_MULTISAMPLE_BUFFER_BIT1_QCOM", },
   { 0x8C2F, "GL_ANY_SAMPLES_PASSED_EXT", },
   { 0x8BD2, "GL_TEXTURE_WIDTH_QCOM", },
@@ -261,7 +261,7 @@
   { 0x00000400, "GL_STENCIL_BUFFER_BIT", },
   { 0x800A, "GL_FUNC_SUBTRACT", },
   { 0x8E2C, "GL_DEPTH_COMPONENT16_NONLINEAR_NV", },
-  { 0x889F, "GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING", },
+  { 0x8508, "GL_DECR_WRAP", },
   { 0x8219, "GL_FRAMEBUFFER_UNDEFINED_OES", },
   { 0x8006, "GL_FUNC_ADD", },
   { 0x8007, "GL_MIN_EXT", },
@@ -563,6 +563,7 @@
   { 0x8CAB, "GL_RENDERBUFFER_SAMPLES_ANGLE", },
   { 0x8057, "GL_RGB5_A1", },
   { 0x8056, "GL_RGBA4", },
+  { 0x300E, "GL_CONTEXT_LOST", },
   { 0x150A, "GL_INVERT", },
   { 0x01000000, "GL_MULTISAMPLE_BUFFER_BIT0_QCOM", },
   { 0x78ED, "GL_PIXEL_PACK_TRANSFER_BUFFER_CHROMIUM", },
@@ -595,7 +596,7 @@
   { 0x8253, "GL_GUILTY_CONTEXT_RESET_EXT", },
   { 0x8CE5, "GL_COLOR_ATTACHMENT5_NV", },
   { 0x8872, "GL_MAX_TEXTURE_IMAGE_UNITS", },
-  { 0x8508, "GL_DECR_WRAP", },
+  { 0x889F, "GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING", },
   { 0x8507, "GL_INCR_WRAP", },
   { 0x8895, "GL_ELEMENT_ARRAY_BUFFER_BINDING", },
   { 0x8894, "GL_ARRAY_BUFFER_BINDING", },