Remove unused methods in WebGraphicsContext3D: isGLES2Compliant() and getPlatformTextureId()

public/platform/WebGraphicsContext3D.h

Index: public/platform/WebGraphicsContext3D.h
diff --git a/public/platform/WebGraphicsContext3D.h b/public/platform/WebGraphicsContext3D.h
index 54bf283e27dc2d5b9598119b402772b69daa8df9..2f19c1d59a4630ecc9bdb1c053e1ee99fdb78ffc 100644
--- a/public/platform/WebGraphicsContext3D.h
+++ b/public/platform/WebGraphicsContext3D.h
@@ -182,10 +182,6 @@ public:
     virtual void discardBackbufferCHROMIUM() { }
     virtual void ensureBackbufferCHROMIUM() { }
 
-    // FIXME: this api is not used anymore.
-    // Query whether it is built on top of compliant GLES2 implementation.
-    virtual bool isGLES2Compliant() { return true; }
-
     virtual unsigned insertSyncPoint() { return 0; }
     virtual void waitSyncPoint(unsigned) { }
     // This call passes ownership of the WebGraphicsSyncPointCallback to the
@@ -199,12 +195,6 @@ public:
     // ordering. Returns true on success.
     virtual bool readBackFramebuffer(unsigned char* pixels, size_t bufferSize, WebGLId framebuffer, int width, int height) = 0;
 
-    // FIXME: this api is not used anymore.
-    // Returns the id of the texture which is used for storing the contents of
-    // the framebuffer associated with this context. This texture is accessible
-    // by the gpu-based page compositor.
-    virtual WebGLId getPlatformTextureId() { return 0; }
-
     // Copies the contents of the off-screen render target used by the WebGL
     // context to the corresponding texture used by the compositor.
     virtual void prepareTexture() = 0;