Implement OES_texture_float_linear and OES_texture_half_float_linear extensions in WebGL.

Source/core/html/canvas/OESTextureHalfFloatLinear.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
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 #include "config.h"
 
-#include "core/html/canvas/WebGLDepthTexture.h"
+#include "core/html/canvas/OESTextureHalfFloatLinear.h"
 
 #include "core/platform/graphics/Extensions3D.h"
 
 namespace WebCore {
 
-WebGLDepthTexture::WebGLDepthTexture(WebGLRenderingContext* context)
+OESTextureHalfFloatLinear::OESTextureHalfFloatLinear(WebGLRenderingContext* context)
     : WebGLExtension(context)
 {
-    context->graphicsContext3D()->getExtensions()->ensureEnabled("GL_CHROMIUM_depth_texture");
+    context->graphicsContext3D()->getExtensions()->ensureEnabled("GL_OES_texture_half_float_linear");
 }
 
-WebGLDepthTexture::~WebGLDepthTexture()
+OESTextureHalfFloatLinear::~OESTextureHalfFloatLinear()
 {
 }
 
-WebGLExtension::ExtensionName WebGLDepthTexture::getName() const
+WebGLExtension::ExtensionName OESTextureHalfFloatLinear::getName() const
 {
-    return WebGLDepthTextureName;
+    return OESTextureHalfFloatLinearName;
 }
 
-PassOwnPtr<WebGLDepthTexture> WebGLDepthTexture::create(WebGLRenderingContext* context)
+PassOwnPtr<OESTextureHalfFloatLinear> OESTextureHalfFloatLinear::create(WebGLRenderingContext* context)
 {
-    return adoptPtr(new WebGLDepthTexture(context));
+    return adoptPtr(new OESTextureHalfFloatLinear(context));
 }
 
-bool WebGLDepthTexture::supported(WebGLRenderingContext* context)
+bool OESTextureHalfFloatLinear::supported(WebGLRenderingContext* context)
 {
     Extensions3D* extensions = context->graphicsContext3D()->getExtensions();
-    return extensions->supports("GL_CHROMIUM_depth_texture")
-        || extensions->supports("GL_OES_depth_texture")
-        || extensions->supports("GL_ARB_depth_texture");
+    return extensions->supports("GL_OES_texture_half_float_linear");
 }
 
-const char* WebGLDepthTexture::getExtensionName()
+const char* OESTextureHalfFloatLinear::getExtensionName()
 {
-    return "WEBGL_depth_texture";
+    return "OES_texture_half_float_linear";
 }
 
 } // namespace WebCore