command_buffer: Implement path rendering functions for CHROMIUM_path_rendering

gpu/command_buffer/service/gpu_switches.cc

Index: gpu/command_buffer/service/gpu_switches.cc
diff --git a/gpu/command_buffer/service/gpu_switches.cc b/gpu/command_buffer/service/gpu_switches.cc
index d2ca49018b76946986abd318e78757f758a16cd4..171f543b7d44e11b32df43eddf996d04712fa9bc 100644
--- a/gpu/command_buffer/service/gpu_switches.cc
+++ b/gpu/command_buffer/service/gpu_switches.cc
@@ -71,25 +71,31 @@ const char kGLShaderIntermOutput[] = "gl-shader-interm-output";
 // round intermediate values in ANGLE.
 const char kEmulateShaderPrecision[] = "emulate-shader-precision";
 
+// Enables using path rendering implementation implemented currently
+// in NV_path_rendering OpenGL extension. Requires compatible hardware
+// and driver. This is used in GPU rasterization.
+const char kEnableGLPathRendering[] = "enable-gl-path-rendering";
+
 const char* kGpuSwitches[] = {
-  kCompileShaderAlwaysSucceeds,
-  kDisableGLErrorLimit,
-  kDisableGLSLTranslator,
-  kDisableGpuDriverBugWorkarounds,
-  kDisableShaderNameHashing,
-  kEnableGPUCommandLogging,
-  kEnableGPUDebugging,
-  kEnableGPUServiceLoggingGPU,
-  kDisableGpuProgramCache,
-  kEnforceGLMinimums,
-  kForceGpuMemAvailableMb,
-  kGpuDriverBugWorkarounds,
-  kGpuProgramCacheSizeKb,
-  kDisableGpuShaderDiskCache,
-  kEnableShareGroupAsyncTextureUpload,
-  kEnableSubscribeUniformExtension,
-  kGLShaderIntermOutput,
-  kEmulateShaderPrecision,
+    kCompileShaderAlwaysSucceeds,
+    kDisableGLErrorLimit,
+    kDisableGLSLTranslator,
+    kDisableGpuDriverBugWorkarounds,
+    kDisableShaderNameHashing,
+    kEnableGPUCommandLogging,
+    kEnableGPUDebugging,
+    kEnableGPUServiceLoggingGPU,
+    kDisableGpuProgramCache,
+    kEnforceGLMinimums,
+    kForceGpuMemAvailableMb,
+    kGpuDriverBugWorkarounds,
+    kGpuProgramCacheSizeKb,
+    kDisableGpuShaderDiskCache,
+    kEnableShareGroupAsyncTextureUpload,
+    kEnableSubscribeUniformExtension,
+    kGLShaderIntermOutput,
+    kEmulateShaderPrecision,
+    kEnableGLPathRendering,
 };
 
 const int kNumGpuSwitches = arraysize(kGpuSwitches);